A man in his 40s was robbed and fatally shot in the upper torso while in his garage in San Dimas Tuesday night, authorities said.

Family members found the victim in the garage, in the 1800 block of Hawkbrook Drive, sheriff’s Lt. Arturo Spencer said, with deputies responding about 6:45 p.m.

The garage door was open and some of the man’s personal belongings were taken, the lieutenant said, declining to reveal the items.

Investigators are looking into the possibility the victim had been followed, Spencer said, and canvassing the area for surveillance video.

The Medical Examiner’s Office had not yet publicly identified the victim.

“My heart goes out to the family on this tremendous loss,” San Dimas Mayor Emmett Badar said in a statement. “This is a priority investigation, and I have faith in our Sheriff’s Office to properly investigate and bring this suspect to justice.”

Patrols in the area were increased and support and resources were being offered to those directly affected, said Anissa Livas, a spokeswoman for the city.

Lt. Spencer asked anyone with information about the case or video to call the sheriff’s Homicide Bureau at 323-890-5500. Anonymous tipsters can contact Crime Stoppers at 800-222-8477 or at lacrimestoppers.org.