The U.S. Secret Service is investigating news reports alleging that about a dozen agents paid for the services of prostitutes while in El Salvador last year.

An official who spoke on condition of anonymity told the Associated Press that the agency is verifying the accuracy of the reports.

Seattle's KIRO-TV reported this week, quoting a government subcontractor, that U.S. agents in the Central American country, where they were providing advance security ahead of a presidential visit, took part in activities similar to what allegedly happened in Colombia in advance of President Barack Obama's recent trip to Cartagena, where the president attended a Summit of the Americas meeting.

Twelve agents, including two supervisors, were implicated in the Colombian prostitution scandal that came to light on April 13 after a fight between a prostitute and an agent. All of the military personnel involved who had security clearance had it suspended.

Department of Homeland Security Secretary Janet Napolitano testified before the Senate Judiciary Committee on Wednesday that the Colombian scandal was a huge disappointment to the men and women of the Secret Service.

Secret Service spokesman Edwin Donovan told Fox News that the Cartagena investigation generated several news stories with allegations from mostly unnamed sources. But he added that any information brought to our attention that can be assessed as credible will be followed up on in an appropriate manner.