Belleville police have charged a man with armed robbery, a crime for which he was already in custody in Middlesex County, a department spokesman said Monday.

On Oct . 5 at 5:40 pm, a man driving a Pontiac pulled into the Mobil station at 95 Washington Ave., Lt. James Giuliano told Patch. After asking for a fill-up, the motorist got out of the car and pulled a gun on the attendant, demanding cash. The robber made off with $550, Giuliano said.

The car was found the following day in Philipsburg. 

Three days later, on Oct. 9, a Belleville detective read a story on NJ.com about the arrest of Carl Murray, 27, of Philipsburg, who was charged with the robbery of a gas station in South Plainfield. Murray was also a suspect in the Belleville robbery, Giuliano said.

Murray, who was in the MIddlesex County jail, was later identified in a lineup by the Belleville gas station attendant, Giuliano said. He faces robbery and weapons charges.