Police are looking for a man suspected of stealing a cell phone from another shopper Thursday at Bob’s Store, 889 Post Road — an incident recorded on surveillance video.

The female victim told police she was shopping with her son at the store around 3:30 p.m., and while in the shoe department, put down both her keys and cell phone. She initially left the phone behind and when she returned, it was gone. The phone’s GPS indicated it was in Bridgeport, near East Main and Spring streets, police said.

A review of the store’s surveillance video showed a man who police believe is a suspect in the theft.

An unrelated cell phone theft earlier that day at McDonald’s at the Post Road traffic circle is also being investigated. The male victim told police he had finished eating lunch and left his iPhone 5 on a table while he went into the bathroom. When he returned, the phone was gone. Surveillance video at the restaurant is being reviewed.