MIAMI -- A man suspected of fatally shooting a Philadelphia police officer has been apprehended in South Florida.

Authorities apprehended John Lewis, 21, at a Miami homeless shelter at about 7 a.m. Tuesday, working off a tip from someone who saw the local news coverage of the manhunt.

Lewis was taken from the shelter to the Miami Police Department, where he was being questioned.

An employee of the Greyhound bus station at 1012 NW First Ave. told federal authorities Lewis was seen getting off of a bus at the station early Monday morning.

Lewis has been the target of an intense manhunt following the shooting death of Philadelphia police Officer Chuck Cassidy. The officer, a 25-year veteran of the force, was killed on the morning of Oct. 31.

Cassidy walked inside of a Philadelphia-area donut shop during an armed robbery. Investigators believe Lewis got startled and shot Cassidy in the head before making off with the slain officer's gun.

Agents from the U.S. Marshals Office have been to the Greyhound bus station in downtown Miami to interview several employees. At the bus terminal, Lewis was overheard telling someone that he was headed to South Beach to look for a job.