Port-au-Prince, Haiti CNN  — 

The violent fallout from the assassination of Haitiian President Jovenel Moise was evident on Friday near his private residence in the capital of Port-au-Prince.

Burned-out cars, spent bullet casings, bloodstains and bullet-pocked walls were what remained of a shootout between the police and some of the suspected assassins on Route de Kenscoff.

Haitian authorities told CNN that three burned-out cars belonged to members of the armed group who assassinated Moise early Wednesday morning.

The armed group are “professional killers,” consisting of more than two dozen people, including two American citizens and retired members of the Colombian military, authorities have said.

But as more details begin to emerge of the people who allegedly killed Moise, little is known about the suspected masterminds and their motivation for the attack.

Police have so far arrested 20 suspects in connection to the fatal shooting and a mass, countrywide manhunt is underway for at least five additional suspects. Police previously said that 28 people are suspected in the assassination.

On Friday, police published a list of the names of 19 suspects who had been apprehended by authorities, which they said included 17 Colombians and two Haitian-Americans. Shortly afterward, police announced that an additional Colombian suspect had been arrested.

The State Department is aware of the arrest of two US citizens in Haiti following the attack, a State Department official said on Friday, adding that the US was sending investigative assistance to the country on its request.

The burned-out remains of cars that belonged to the suspected asassins of Haiti's President on Route de Kenschoff.

The Haitian government on Friday requested US troops to help protect infrastructure, ports, airports and energy systems following the assassination, Elections Minister Mathias Pierre told CNN. Mathias said the request was for a limited number of around 500 troops, and that he anticipated the threat to be “potential mercenaries.”

Haiti’s acting Prime Minister Claude Joseph also asked the UN to deploy troops to help secure the country’s ports, airports and oil terminals. In addition, he asked the agency for assistance with electoral security and to help further investigate the assassination.

Haitian officials have given conflicting accounts and numbers for those killed following the assassination attack. Citing figures from Haitian police, the office of Joseph told CNN that three suspects were killed in a shootout with authorities.

As the pursuit of those responsible intensifies, details have emerged relating to the arrest of 11 armed men in the grounds of Taiwan’s embassy in the capital Port-au-Prince on Thursday.

Taiwan’s foreign ministry spokesperson, Joanne Ou, told CNN the embassy called local police after security guards reported “a group of armed suspects” entering embassy grounds. She said 11 suspects, described in a separate foreign ministry statement as “mercenaries,” were arrested at 4 p.m. inside the embassy without resistance and only a few doors and windows were damaged.

The Taiwanese Foreign Ministry did not give information about the nationalities of those taken into custody, and it is not yet clear if the 11 suspects are among the 20 detained by police.

With tension high in the capital, crowds of people took to the streets Thursday night, burning cars and demanding justice. For weeks, Port-au-Prince has been reeling from violence which has claimed the lives of many citizens. Moise’s death has left a power vacuum and deepened the turmoil from the violence, a growing humanitarian crisis, and a worsening Covid-19 epidemic.

Much of the public anger has so far centered on the foreign nationals arrested in connection to the shooting. Speaking to CNN late Thursday, Pierre identified the two Americans arrested as James Solages and Joseph Vincent, both naturalized US citizens from Haiti.

Haiti's police chief described the men presented at the press conference as attackers that have been apprehended.

Thirteen retired members of the Colombian Army, all believed to be involved in Moise’s assassination, traveled to Haiti over the past months – almost all of them through the Dominican Republic – Colombian National Police Chief General Jorge Vargas announced during a press conference on Friday.

“Two of them, Giraldo Duberney Capador, who was killed during an operation by Haiti Police, and Alejandro Rivera Garcia, detained by Haiti Police, flew from Bogota to Santo Domingo via Panama on May 6 and from Santo Domingo flew to Port-au-Prince on May 10,” Vargas said, as he presented a layout of mugshots of the identified Colombians.

Vargas said several others detained by the Haitian Police are Victor Albeiro Pineda, Manuel Antonio Grosso, John Jairo Ramírez, Alejandro Giraldo Zapata, Franco Castañeda, Angel Yarce Sierra, Carlos Guerrero, Francisco Uribe, Enalbert Vargas and Jhon Jairo Suárez.

He said they flew from Bogota El Dorado airport to Punta Cana Airport in the Dominican Republic on June 4 and entered Haiti via land border on June 6.

Vargas added that another Colombian man, Mauricio Javier Romero, was also killed by Haitian Police, albeit his travel route remains unknown.

None of the 13 alleged perpetrators of the attack were on active duty, Vargas said, adding that Colombian police identified four private security companies allegedly involved and are pursuing investigations.

Vargas previously said at least four alleged attackers arrested by the Haiti Police were retired soldiers.

The director of the Colombian National Intelligence Service and the director of the Intelligence Division of the National Colombian Police are to travel to Haiti to join the investigations, Colombian President Ivan Duque said on Twitter on Friday.

“I’ve just spoken with Haiti PM Claude Joseph. We express our solidarity and support in this moment. We offer our full cooperation to uncover the truth behind the authors of the assassination of President J. Moise,” Duque added on Twitter.

What’s next for Haiti

It was 1 a.m. when the attackers stormed the President’s private residence in Petion-Ville, a suburb of Haiti’s capital, shooting Moise 16 times, according to former Prime Minister Laurent Lamothe. First lady Martine Moise, who was also shot in the attack, was evacuated to intensive care in a hospital in Miami. Haiti’s ambassador to the United States, Bocchit Edmond, said he believes the first lady is “now out of danger.”

Following the assassination, Joseph, the acting Prime Minister, declared a “state of siege” in Haiti, closing the country’s borders and imposing martial law. He appealed to the public to “keep helping us” and “if you see something, say something.”

The assassination leaves a huge power vacuum in Haiti. Its parliament is effectively defunct and two men are simultaneously claiming to be the country’s rightful leader. Joseph has not been confirmed by parliament – which has not sat since 2020 – and he was in the process of being replaced by Ariel Henry, whom the President appointed shortly before his death. Henry told the Haitian newspaper le Nouvelliste that “Claude Joseph is not prime minister, he is part of my government.”

Moise, 53, was a former banana exporter and divisive figure in Haitian politics. He spent most of the past year waging a political war with the opposition over the terms of his presidency.

For now, it isn’t immediately clear who will replace him. Judge Jean Wilner Morin, President of the National Association of Haitian Judges, told CNN the line of presidential succession in the country is now murky.

Throughout his presidency, Moise had repeatedly failed to hold elections at local and national levels, leaving much of the country’s governing infrastructure empty. A constitutional referendum is set to be held in September, alongside the presidential and legislative elections. Municipal and local elections have been scheduled for January 16, 2022, the official electoral calendar also showed.

Many in the country had disputed Moise’s right to continue serving in the presidency this year.

While the US, United Nations and Organization of American States supported his claim to a fifth year in office, critics say he should have stepped down on February 7, citing a constitutional provision that starts the clock once a president is elected, rather than when he takes office.

Moise, however, claimed his five-year term should end in 2022 because he wasn’t sworn in until February 2017. His inauguration was delayed over allegations of voter fraud during the 2015 election, which led to a presidential runoff that was postponed twice over what authorities called threats and “security concerns.”

Citizens take part in a protest near the police station of Petion Ville after Haitian President Jovenel Moïse was murdered on July 8, in Port-au-Prince, Haiti.

This is playing out under the backdrop of extreme violence in Haiti’s capital, with rival groups battling one another or the police for control of the streets, displacing tens of thousands of people and worsening the country’s humanitarian crisis.

Meanwhile, the coronavirus pandemic has been worsening in Haiti. UNICEF, the United Nations’ children’s agency, said Thursday that Haiti was the only country in the Western Hemisphere to not have received a single dose of Covid-19 vaccine.

At the same time, the country is facing a dire economic situation. Its economy had been contracting even before the pandemic and shrunk further 3.8% in 2020, with about 60% of the population now living in poverty, according to the World Bank.

According to UNICEF, more than 1.5 million children are currently in urgent need of humanitarian assistance in Haiti. “The new wave of violent incidents that may arise after the killing of the President of Haiti could further exacerbate the humanitarian needs and hinder humanitarian access to the most vulnerable groups, leaving thousands of affected people with little to no assistance,” UNICEF warned.

Caitlin Hu reported from Port-au-Prince, Haiti, and Stefano Pozzebon reported from Bogota, Colombia. CNN’s Priscilla Peyrot, Karen Smith, Chandler Thornton, Larry Register, Kiarinna Parisi, Etant Dupain, Mitchell McCluskey, Gerardo Lemos, Ivana Kottasová, Florencia Trucco and Jack Guy contributed to reporting and writing.