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Crime scene tape surrounds the Mandalay Hotel (background) after a gunman killed at least 50 people and wounded more than 200 others when he opened fire on a country music concert in Las Vegas, Nevada on October 2, 2017. 
Police said the gunman, a 64-year-old local resident named as Stephen Paddock, had been killed after a SWAT team responded to reports of multiple gunfire from the 32nd floor of the Mandalay Bay, a hotel-casino next to the concert venue. / AFP PHOTO / Mark RALSTON        (Photo credit should read MARK RALSTON/AFP/Getty Images)
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Crime scene tape surrounds the Mandalay Hotel (background) after a gunman killed at least 50 people and wounded more than 200 others when he opened fire on a country music concert in Las Vegas, Nevada on October 2, 2017. Police said the gunman, a 64-year-old local resident named as Stephen Paddock, had been killed after a SWAT team responded to reports of multiple gunfire from the 32nd floor of the Mandalay Bay, a hotel-casino next to the concert venue. / AFP PHOTO / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
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(CNN) -- In the early days of the investigation into the Las Vegas mass shooting, two people were named as persons of interest in the case, according to newly released police search warrants.        One was deceased shooter Stephen Paddock's girlfriend, Marilou Danley, who has since been publicly cleared in the case. The name of the other was redacted in hundreds of pages of documents released Tuesday to the media.        The Las Vegas Review-Journal has identified that individual as Douglas Haig. Haig did not respond to phone calls Tuesday evening.
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(CNN) -- In the early days of the investigation into the Las Vegas mass shooting, two people were named as persons of interest in the case, according to newly released police search warrants. One was deceased shooter Stephen Paddock's girlfriend, Marilou Danley, who has since been publicly cleared in the case. The name of the other was redacted in hundreds of pages of documents released Tuesday to the media. The Las Vegas Review-Journal has identified that individual as Douglas Haig. Haig did not respond to phone calls Tuesday evening.
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This undated photo provided by the Las Vegas Metropolitan Police Department shows Marilou Danley. Danley, 62, returned to the United States from the Philippines on Tuesday night, Oct. 3, 2017, and was met at Los Angeles International Airport by FBI agents, according to a law enforcement official. Authorities are trying to determine why Stephen Paddock, Danley's boyfriend, killed dozens of people in Las Vegas Oct. 1, in the deadliest mass shooting in modern U.S. history. (Las Vegas Metropolitan Police Department via AP, File)
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This undated photo provided by the Las Vegas Metropolitan Police Department shows Marilou Danley. Danley, 62, returned to the United States from the Philippines on Tuesday night, Oct. 3, 2017, and was met at Los Angeles International Airport by FBI agents, according to a law enforcement official. Authorities are trying to determine why Stephen Paddock, Danley's boyfriend, killed dozens of people in Las Vegas Oct. 1, in the deadliest mass shooting in modern U.S. history. (Las Vegas Metropolitan Police Department via AP, File)
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Crime scene tape surrounds the Mandalay Hotel (background) after a gunman killed at least 50 people and wounded more than 200 others when he opened fire on a country music concert in Las Vegas, Nevada on October 2, 2017. 
Police said the gunman, a 64-year-old local resident named as Stephen Paddock, had been killed after a SWAT team responded to reports of multiple gunfire from the 32nd floor of the Mandalay Bay, a hotel-casino next to the concert venue. / AFP PHOTO / Mark RALSTON        (Photo credit should read MARK RALSTON/AFP/Getty Images)
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LAS VEGAS, NV - OCTOBER 02: An injured person is tended to in the intersection of Tropicana Ave. and Las Vegas Boulevard after a mass shooting at a country music festival nearby on October 2, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, killing over 20 people. Police have confirmed that one suspect has been shot dead. The investigation is ongoing. (Photo by Ethan Miller/Getty Images)
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(CNN) —  

In addition to his frequent forays into casinos and gun shops, Las Vegas strip killer Stephen Paddock took 20 cruises, many of them in Europe and the Middle East, investigators have learned.

The cruises included stops at ports in Spain, Italy, Greece, Jordan and the United Arab Emirates, according to information provided by a law enforcement source who asked not to be identified because the source was not authorized to share information about the investigation. Paddock’s girlfriend, Marilou Danley, accompanied him on nine of the cruises.

The information provided by the source did not specify the cruise line involved, the type of cruises, when they occurred or the couple’s reason for travel. Most cruise ships have casinos on board, and Paddock was an avid gambler.

Investigators have taken note of the foreign travel as they attempt to piece together a profile of the mass killer and a timeline of his activities leading up to the attack that left at least 58 people dead and nearly 500 injured.

Mandalay Bay windows, inset with Las Vegas killer Stephen Paddock
David Becker/Getty Images | Eric Paddock/WKMG
Mandalay Bay windows, inset with Las Vegas killer Stephen Paddock

Paddock’s car, a 2017 Chrysler Pacifica Touring, was found in the hotel parking garage and contained 90 pounds of Tannerite and two suitcases filled with hundreds of rounds of ammunition, according to information provided by the source.

Authorities suspect the Tannerite was intended for use in target practice or to make the car explode if fired upon, according to information provided by the source.

The information from the source was derived from intelligence obtained earlier this week. Authorities have since said that the vehicle contained 50 pounds of Tannerite.

So far, investigators have found no evidence supporting a claim by ISIS that Paddock had converted to Islam and carried out the attack on the terror group’s behalf, according to the information provided by the source. Paddock’s girlfriend, Danley, has been unable to provide a motive for the mass killing, according to the information.

Investigators have also determined that Paddock booked three rooms at the Ogden, a luxury condominium tower in Las Vegas, between September 17 and September 28. The condos were on high floors and facing north overlooking the Life Is Beautiful music festival, according to the information provided by the source. He attempted to book a room at the El Cortez, but there were no vacancies, according to the information.

The source said investigators recovered a notepad with numbers in it “significant to the gunman” and were attempting to determine their meaning.

The presence of the numbers was first reported by The New York Times, based on an interview with Sheriff Joseph Lombardo of the Las Vegas Metropolitan Police Department.

This story has been updated to reflect additional information provided by a law enforcement source.