FREMONT — Masked gunmen took over a Fremont fast-food restaurant over the weekend, shoved some of its fast food employees into a refrigerator and then made off with cash, police said.

No one was injured and the three male suspects involved in the Saturday night heist were arrested a short time later, police said. Officers were called about 9:50 p.m. to the McDonalds at 4318 Thornton Ave. after an employee dialed 911 to report an armed robbery, said police spokeswoman Geneva Bosques.

Witnesses told police that two masked suspects entered the store armed with semi-automatic handguns, ordered a store manager to open the safe and took cash. The suspects then ordered the store employees to empty their pockets, told them to get into the store’s refrigerator and shut the door.

Fearing for their safety, the employees remained in the refrigerator for about 15 minutes before finally coming out to call 911, Bosques said.

An investigation led officers to a home in Union City where they arrested one of the suspects. Police also captured two other suspects at a home in Hayward, Bosques said.

Police did not say what role the third suspect played in the armed robbery.

“Detectives are still working this case and looking into whether the suspects may have been involved in other robberies,” Bosques said Monday. She did not elaborate.

As of Monday evening police had not released the names of the three suspects who were arrested and the incident remained under investigation.

Anyone with information about the armed robbery is asked to call police at 510-790-6800. Anonymous tip line: 510-494-4856.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.