Left: Warren Christopher Clark, Right: Zaid Abed al-Hamed
Left: Warren Christopher Clark, Right: Zaid Abed al-Hamed
PHOTO: Syrian Democratic Forces
Now playing
00:53
Militia: Americans accused of fighting for ISIS
Now playing
02:23
Tropical activity poses threat in Southern Hemisphere
PHOTO: Indonesia Search and Rescue Agency
Now playing
02:09
Woman who is trapped underneath earthquake's rubble captured on video
Barrie
Barrie's aunt speaks about how the police brought her the news about the death of her nephew Ibrahima.
PHOTO: VTM
Now playing
01:26
Aunt of Black man who died after arrest in Belgium: We want justice
screengrab US social media
screengrab US social media
PHOTO: Getty Images
Now playing
04:35
Tech companies ban Trump, but not other problematic leaders
Now playing
01:23
Rejected Tintin cover breaks world record for comic book art
WASHINGTON, DC - JANUARY 13:  Speaker of the House Nancy Pelosi (D-CA) presides over the vote to impeach U.S. President Donald Trump for the second time in little over a year in the House Chamber of the U.S. Capitol January 13, 2021 in Washington, DC. The House voted to impeach Trump on the charge of "incitement of insurrection," 232-197 after a mob of his supporters attacked the U.S. Capitol where Congress was working to certify the Electoral College victory of President-elect Joe Biden on January 6. 10 Republicans voted to impeach. (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - JANUARY 13: Speaker of the House Nancy Pelosi (D-CA) presides over the vote to impeach U.S. President Donald Trump for the second time in little over a year in the House Chamber of the U.S. Capitol January 13, 2021 in Washington, DC. The House voted to impeach Trump on the charge of "incitement of insurrection," 232-197 after a mob of his supporters attacked the U.S. Capitol where Congress was working to certify the Electoral College victory of President-elect Joe Biden on January 6. 10 Republicans voted to impeach. (Photo by Chip Somodevilla/Getty Images)
PHOTO: Chip Somodevilla/Getty Images
Now playing
02:35
How the world is reacting to Trump's second impeachment
Indonesia sriwijay air crash search for victims wang pkg intl hnk vpx_00000920.png
Indonesia sriwijay air crash search for victims wang pkg intl hnk vpx_00000920.png
Now playing
02:21
Family members wait in anguish as search for crash victims continues
africa china coronavirus vaccine diplomacy lu stout pkg vpx _00025522.png
africa china coronavirus vaccine diplomacy lu stout pkg vpx _00025522.png
PHOTO: CCTV
Now playing
03:09
How China is hoping to use its vaccine as a diplomatic tool
PHOTO: CIRO FUSCO/AFP/ANSA/AFP via Getty Images
Now playing
00:38
Huge sinkhole appears in Italian hospital parking lot
TOPSHOT - Rescue workers carry recovered debris at the port in Jakarta on January 10, 2021, during the search operation for Sriwijaya Air flight SJY182 which crashed after takeoff from Jakarta on January 9. (Photo by Dany Krisnadhi / AFP) (Photo by DANY KRISNADHI/AFP via Getty Images)
TOPSHOT - Rescue workers carry recovered debris at the port in Jakarta on January 10, 2021, during the search operation for Sriwijaya Air flight SJY182 which crashed after takeoff from Jakarta on January 9. (Photo by Dany Krisnadhi / AFP) (Photo by DANY KRISNADHI/AFP via Getty Images)
PHOTO: Dany Krisnadhi/AFP/Getty Images
Now playing
02:16
Indonesian jetliner crashes after taking off from Jakarta
 HONG KONG PRO DEMOCRACY ACTIVIST VENTUS LAU BEING ESCORTED BY POLICE.
HONG KONG PRO DEMOCRACY ACTIVIST VENTUS LAU BEING ESCORTED BY POLICE.
PHOTO: VENTUS LAU FACEBOOK PAGE/Reuters
Now playing
03:15
See Hong Kong police arrest former pro-democracy lawmakers
Tensions between the United States and Iran are likely to further escalate once again after Tehran seized a South Korean-flagged chemical tanker in the Persian Gulf, according to semi-official Iranian news agencies, and announced it had resumed enriching uranium to 20% purity, far beyond the limits laid out in the 2015 nuclear deal. President Donald Trump walked away from the agreement in 2018. CNN
Tensions between the United States and Iran are likely to further escalate once again after Tehran seized a South Korean-flagged chemical tanker in the Persian Gulf, according to semi-official Iranian news agencies, and announced it had resumed enriching uranium to 20% purity, far beyond the limits laid out in the 2015 nuclear deal. President Donald Trump walked away from the agreement in 2018. CNN's Paula Hancocks reports.
PHOTO: YJC
Now playing
02:37
Footage shows chemical tanker seized by Iranian forces
A European health worker prepares a shot of the coronavirus vaccine.
A European health worker prepares a shot of the coronavirus vaccine.
PHOTO: Reuters
Now playing
02:14
Frustration in Europe over pace of coronavirus vaccine rollout
Jack Ma, the co-chair of the UN High-Level Panel on Digital Cooperation, founder of Alibaba Group, attends the Bund Summit in Shanghai. He says that the essence of finance is credit management. We must change the pawnshop idea of Finance and rely on the credit system. Shanghai, China, 24 October 2020.

Jack Ma, the co-chair of the UN High-Level Panel on Digital Cooperation, founder of Alibaba Group, attended the Bund Summit in Shanghai. He says that the essence of finance is credit management. We must change the pawnshop idea of Finance and rely on the credit system.No Use China. No Use France.
Jack Ma, the co-chair of the UN High-Level Panel on Digital Cooperation, founder of Alibaba Group, attends the Bund Summit in Shanghai. He says that the essence of finance is credit management. We must change the pawnshop idea of Finance and rely on the credit system. Shanghai, China, 24 October 2020. Jack Ma, the co-chair of the UN High-Level Panel on Digital Cooperation, founder of Alibaba Group, attended the Bund Summit in Shanghai. He says that the essence of finance is credit management. We must change the pawnshop idea of Finance and rely on the credit system.No Use China. No Use France.
PHOTO: Zhao Yun/Oriental Image/Reuters
Now playing
03:05
Chinese tech tycoon has not been seen in months
(CNN) —  

The US-backed Syrian Democratic Forces (SDF) captured two Americans in Syria who are suspected of being ISIS fighters, the militia said in a press release Sunday.

The militia identified the men as Warren Christopher Clark (Abu Mohammad al-Ameriki) and Zaid Abed al-Hamid (Abu Zaid al-Ameriki).

The SDF said Clark is originally from Houston, but it gave no specific location in the United States for the other man’s origin.

The Americans were captured in a group that also contained fighters from Ireland and Pakistan, SDF said.

A Pentagon spokesman said the incident is under investigation.

“We are aware of open source reports of reportedly American citizens currently in custody who were believed to be fighting for ISIS. However, we are unable to confirm this information at this time,” Commander Sean Robertson said.

The White House announced last month that ISIS had been defeated in Syria and the United States would withdraw 2,000 troops from the war-stricken nation.

In October, the US military released another American citizen suspected of being a member of ISIS who was captured in Syria.

The dual US-Saudi national was held by the US military in Iraq without being tried since September 2017. His fate was the subject of a months-long legal battle between the US government and the American Civil Liberties Union.

When he was released, CNN reported that SDF has more than 700 foreign terrorist fighters in custody from some 40 countries.

US officials have encouraged countries to repatriate their citizens in detention in Syria in order to ease the burden on the SDF’s detention facilities. But many countries are reluctant to do so because of the difficulty of prosecuting suspected ISIS members based on evidence collected on the battlefield.