A couple was photographed having sex on the roof of the Ronald Reagan Federal Courthouse in Harrisburg, Pennsylvania by a resident who lives in an apartment nearby.

The resident who was concerned that there was a security breach took the pictures and sent them to WHTM-TV in Harrisburg, which in turn, alerted authorities. The U.S. Marshals Service has confirmed that the photos shows one of its employees engaging in sexual acts on the roof.

U.S. Marshal Martin J. Pane issued a statement Thursday confirming the employee’s involvement. He said the matter is under investigation. He also said the Marshals Service is confident that the security integrity of the courthouse is intact.