Alejandro Porfidio Ortiz, 53, of San Bernardino was walking near the 300 block of West Base Line around 9:30 p.m. on Wednesday when three men approached him, according to police. One of the men punched Ortiz in the back of the head, knocking him to the ground; a witness saw the men search his pockets and take property before fleeing. Ortiz was taken to Arrowhead Regional Medical Center in Colton and was pronounced brain dead late Thursday night.

Investigators are looking for the three attackers in connection with the fatal assault. Anyone with information about the incident is asked to contact Detective Glenn O’Neal at 909-384-5745. If you saw Ortiz that evening or have details about the men who attacked him, please come forward.