The search is on for an unidentified man who scaled a fence at the United Nations building Saturday morning at dawn, triggered an alarm, evaded security officers, evaded police officers, and escaped by leaping into the East River.

The break-in took place at roughly 6 a.m. yesterday, when the man reached the UN compound's North Lawn building. There, the Daily News reports that he was grabbed by two security officers, but managed to break free and leap three stories down from a promenade onto the FDR Drive. Sources told ABC that the man had been "emotionally disturbed."

UN officials called 911 at roughly 7:30 a.m., but the man proved too quick for officers on the FDR. Police told the tabloid he leapt into the river at East 42nd Street, and despite hours spent combing the waters, NYPD Harbor and Fire Department vehicles did not recover his body. The trespasser is still at large, nowhere to be found.

A backpack left behind at the UN compound reportedly contained paperwork suggesting the man had recently been let out of prison. An NYPD spokesperson confirmed that the man is still at large.