PORTER RANCH (CBSLA) – Police are looking for a man suspected of committing armed robberies at Subway sandwich shops on four consecutive nights this week in the San Fernando Valley.

A Subway shop which was robbed at gunpoint in Porter Ranch. (CBS2)

The four robberies occurred around closing, sometime between 9:50 p.m. and 10:30 p.m. Monday through Thursday, Los Angeles police report.

READ MORE: Would You Pay $1,000 For A Private Dinner On A Trolley?

Every robbery had similar characteristics: the suspect entered the store armed with a handgun and demanded cash. After receiving it, he then ran from the store. The description of the suspect provided to police in every robbery was similar.

The first robbery occurred Monday at a store located at 8672 Lindley Ave. in Northridge. Tuesday’s robbery occurred at 9008 Balboa Blvd. in Northridge. Wednesday’s happened at 11878 Balboa Blvd. in Granada Hills, while Thursday’s occurred at 19300 Rinaldi St. in Porter Ranch.

READ MORE: Homeless Man Charged With Arson In Palisades Fire

“We know all the people that work at Subway, we get lunch from them all the time, and I feel so bad that that happened to them,” said Marianna Delakyan, who works at nearby Le Salon Complet in Porter Ranch.

There were no injuries in any of the hold-ups.

MORE NEWS: Bridge Work Will Close Paramount Blvd. In Downey

No surveillance video was immediately released, and there was no specific suspect description.