A high-ranking Secret Service supervisor accused of making unwanted sexual advances to one of his employees at agency headquarters last week was placed on leave, a source familiar with the investigation confirmed to NBC News.

The accuser said her boss, Xavier Morales, told her he was in love with her and wanted to have sex with while they were at a party at Capitol City Brewing Company in downtown D.C. the night of March 31, The Washington Post first reported.

Back at the office later that night, Morales allegedly tried to kiss her, then grabbed her arms when she resisted, The Post reported.

Morales was placed on leave with his security clearance suspended April 2, the day the incident was reported, according to a spokesperson. Director Joseph Clancy was informed that afternoon, the Secret Service spokesman told NBC News.

Clancy immediately ordered the matter reported to the Office of Homeland Security’s Office of the Inspector General, which is investigating, according to the Secret Service.

“The Secret Service is an agency that demands that our employees conduct themselves with the highest level of integrity,” Clancy said in a statement. “These allegations as reported are very disturbing. Any threats or violence that endangers our employees in the workplace is unacceptable and will not be tolerated.”

U.S. Rep. Elijah Cummings, D-Md., who serves on the House committee that oversees the Secret Service, said while this accusation is disturbing, he's glad that in this case Clancy was notified immediately and took action.

"He cannot control every action of every officer, but when these things happen, he has to send a message that there will be zero tolerance to these types of activities, and so I'm very pleased about that," Cummings said. "But again, we have a lot of work to do. The president's life is on the line, and we've got to protect it."

Morales is a manager in the security clearance division, which determines when agents should lose their jobs, The Post reported, and his wife is a special agent recently promoted to deputy assistant director over government and public affairs.

The allegations come less than a month after two members of the Secret Service came under investigation after the car they were in crashed at the White House complex on March 4 after they were allegedly drinking at a retirement party downtown.