Police are investigating an armed robbery at a hotel in Lehigh County.

It happened at the Howard Johnson along Hamilton Boulevard in South Whitehall Township around 9:07 p.m. Monday.

Police say a man walked in, demanded money from the front desk clerk and displayed a knife. He then ran off and headed west.

Authorities describe the suspect as a male, wearing dark-colored clothing, with his face covered.

The robbery is still under investigation. Anyone with information is asked to call police at 610-398-0337.