Three more employees of the U.S. Secret Service are on the verge of losing their jobs as part of the brewing Colombia sex scandal, the agency said Tuesday.

Two employees will resign, two others have been cleared of the most serious charges, but will face administrative action and be removed from their current positions; a fifth will be relieved of his security clearance, meaning he can no longer work for the Secret Service, but could be employed by other federal agencies. The employee has the right to appeal the decision, the agency said.

“The Secret Service is committed to conducting a full, thorough and fair investigation in this matter, and will not hesitate to take appropriate action should any additional information come to light,” the agency said in a statement.

The decision means the Secret Service has determined the fates of the 12 employees implicated in the scandal, though several could still appeal the decision.

Last week, six other employees either resigned, were fired, or permitted to retire. Another agent was cleared of wrongdoing but will face administrative action.

Secret Service Director Mark Sullivan is closely reviewing the agency’s code of conduct and is considering enforcing a curfew on agents and officers when they are on the road, according to Rep. Elijah Cummings (D-Md.), who spoke with the director Tuesday.

“If you give football players curfews, it makes sense you’d give curfews to people protecting the president,” Cummings said.

Cummings said Sullivan also told him that the Secret Service has concluded that no White House staffers were involved in the sex scandal.

Homeland Security Committee Chairman Peter King (R-N.Y.) once again voiced support Tuesday for the agency’s ongoing investigation.

“This is the first major part of the investigation and it seems to have been completed very effectively and expeditiously,” King said. “Obviously, we’ll continue to investigate to see whether anything else has occurred. We’ll also have to look at trying to determine whether this was an aberration and what procedures can be implemented to minimize the possibility of it ever happening again.”

King said he thinks it would be a good idea for the director to consider bringing in outside advisers to help assess overall agency operations now.

“Everyone is focused on the investigation, because the longer you wait, the easier it is for people to get confused and to forget details,” King said. “All the emphasis was put this week on the 12. But now we’ll look at broader agency issues.”