A group of Secret Service agents and officers sent to Colombia ahead of President Barack Obama were relieved of duty and returned home amid allegations of misconduct that involved prostitution, according to two U.S. government sources familiar the investigation.
Roughly a dozen Secret Service members are being investigated over early findings that they allegedly brought back several prostitutes to the Hotel Caribe in Cartagena, the sources told CNN on Saturday.
Also Saturday, the U.S. military announced that five service members assigned to support the Secret Service in its assignment have been "confined to quarters" in Colombia after they violated curfew and "may have been involved in inappropriate conduct" at the same hotel. The statement, from U.S. Southern Command, did not offer more details, including whether prostitution was involved.
The command's leader, Gen. Douglas Fraser, said he is "disappointed by the entire incident and that this behavior is not in keeping with the professional standards expected of members of the United States military," according to the statement.
The alleged misconduct overshadowed the start of the sixth Summit of the Americas, where the president was to focus on trade, energy and regional security.
None of the agents or officers being investigated was part of the president's personal protective detail and Obama isn't based at the hotel. But dignitaries and journalists reporting on the hemispheric meeting were staying there, a U.S. government official said.
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During the incident, which happened Wednesday night, there was a dispute between at least one Secret Service member and a woman brought back to his hotel over a request to be paid, the U.S. government sources said. At least one of the women brought to the hotel talked with police, and complaints were filed with the U.S. Embassy, the sources said.
A spokesman for Colombia's National Police declined to comment, referring questions to the Secret Service.
As the incident extended into early Thursday morning, a hotel staffer gave Colombian security personnel the entire list of U.S. government personnel staying there, said a U.S. military official who couldn't speak for attribution because of the ongoing investigation.
Secret Service spokesman Edwin Donovon said that the group of agents in Cartegena were relieved of duty Thursday -- prior to the president's arrival in Colombia -- and replaced after "allegations of misconduct."
The U.S. government sources said that, because the trip already had a large security detail, only some of the recalled agents and officers were replaced. Still, the sources said there was no threat to the president.
The matter was being turned over to the agency's internal affairs unit, said Donovon, who declined to give details about the accusations or the number of agents involved.
"Those personnel are being relieved of their assignments, returned to their place of duty, and are being replaced by other Secret Service personnel. The Secret Service takes all allegations of misconduct seriously," he said.
The U.S. military is conducting its own investigation and will mete out "punishment, if appropriate ... in accordance with established policies and the Uniform Code of Military Justice," the Southern Command said in its statement.
The five U.S. service members being investigated are still in Colombia and have been ordered not to contact other individuals, according to the military. They will return to the United States with the rest of their unit at the end of the Colombia mission.
The U.S. military official said it is not possible to identify the names or even the units of the U.S. troops being investigated because they may face administrative punishment, which is not normally made public.
Ronald Kessler, a former Washington Post reporter who has written a book about the Secret Service, called the incident "clearly the biggest scandal in Secret Service history."
The Washington Post, which was the first to report the story, said it was alerted to the investigation by Kessler.
Jon Adler -- president of the Federal Law Enforcement Officers Association, which represents Secret Service agents and other federal law enforcement officers -- urged caution in jumping to conclusions, characterizing the incident as "isolated" and not necessarily a scandal.
"That's just sort of an overdramatic interpretation of an isolated incident," he said. "We have to trust the process of the internal review."
While soliciting prostitution is legal in certain areas of Colombia, it is considered a breach of the agency's conduct code, the government sources said. High-level officials in the Secret Service and the Department of Homeland Security were outraged over the incident, the sources said, noting that the investigation indicated the prostitutes were brought back to a hotel that had been secured for the summit.
The president arrived in Cartagena on Friday, the same day he first learned about the incident, White House press secretary Jay Carney said from the coastal resort city. Obama will spend more time in Colombia, where security concerns had limited previous presidential trips, than any other U.S. president.
Amid the reports that Secret Service agents were being replaced, two small blasts occurred nearly back-to-back in Cartagena.
The explosions -- one near a bus station and another near a shopping mall -- occurred a good distance away from where the world leaders were gathering, said Alberto Cantihho Toncell, a spokesman for the Colombia National Police.
There were no casualties, and only minor damage was reported, Toncell said.
The explosions came on the heels of a similar one earlier in the day near the U.S. Embassy in the capital city of Bogota, authorities said.
The blasts were a reminder of the violence that has gripped Colombia as its government has battled powerful drug cartels. Violence has significantly fallen off in recent years as the Bogota-based government, aided by U.S. extradition efforts, has successfully picked apart the cartels.
More than 7,600 police officers and thousands more troops have been deployed in the walled colonial city of Cartagena as part of stepped up security for the summit.
Submarines are patrolling in the coastal waters near the city, armed helicopters are hovering at the ready and snipers in strategic locations are watching for suspicious activity, officials said before the summit's start. Anti-explosive robots and radiation detectors are also part of the security detail.