German Police Arrest Man in Bomb Threat at US Embassy The man allegedly claimed to have a bomb in his suitcase.

LONDON  -- An unidentified man was detained in Berlin today after allegedly threatening a security officer at the U.S. Embassy, saying he had a bomb in his suitcase, German police said.

"At approximately 7:25 [a.m. local time], a man with a suitcase approached the embassy entrance on Pariser Platz and presented a U.S. passport that he said he wanted to renew," the U.S. Embassy said in a statement. "When the embassy's local guard offered a card with the address for passport services, the man struck the guard with his fist."

As the officer pinned him down and handcuffed him, he allegedly yelled that he had a bomb in his suitcase. A German bomb expert later used a robot to determine the suitcase did not contain any harmful material.

The man is 23 and is believed to hold both U.S. and German citizenship, a police spokesman told ABC News. Police took him into custody and are now looking into whether he should be transferred into psychological care.