ONTARIO, Calif. — Police have identified a man suspected of detonating two explosive devices inside a Sam’s Club store in Southern California.

It happened Thursday afternoon, and authorities say there doesn’t appear to be any damage to the building, and no one was reported injured.

Police in the city of Ontario identified the suspect Thursday as Hugo Gonzalez of Fontana.

They say they believe Gonzalez acted alone when the explosive devices were set off inside the store, which is about 45 miles east of Los Angeles.

Officer Eliseo Guerrero said the man led officers on a short chase after he was seen leaving the store. Police say investigators found additional materials “similar to those used in the devices” inside his car.

Authorities said Gonzalez was in custody and was being questioned.

A motive for the crime remains unknown. Guerrero said the man had no apparent connection to Sam’s Club.