WASHINGTON (AP) — Secret Service agents and officers have been accused of involvement with prostitutes, leaking sensitive information, publishing pornography, sexual assault, illegal wiretaps, improper use of weapons and drunken behavior, according to internal government reports reviewed by The Associated Press on Friday. It wasn't immediately clear how many of the accusations turned out to be true.

The new disclosures of so many serious accusations since 2004 lend weight to concerns expressed by Congress that the Secret Service prostitution scandal in April in Colombia exposed a culture of misconduct within the agency. Secret Service Director Mark Sullivan apologized for the incident during a hearing in May but insisted that what happened in Colombia was an isolated case.

A leading senator who has been investigating the Colombia scandal, Susan Collins, R-Maine, said some of the accusations appeared legitimate and that "adds to my concern about apparent misconduct by some of the personnel of this vital law enforcement agency."