OAKLAND, Calif. — An armed robber in the San Francisco Bay Area pistol-whipped an elderly Asian man and a person who tried to intervene in what police described Friday as a “brazen” attack in broad daylight.

The elderly man was standing on a corner of Oakland’s Chinatown on Thursday when two men walked up and tried to take his belongings. One of the attackers was armed with a gun with an extended magazine, police said in a statement.

The attack comes amid a wave of assaults against Asian Americans in the San Francisco Bay Area and across the country since the coronavirus pandemic took hold in the U.S.

Surveillance video tweeted by a KPIX-TV reporter shows the elderly victim on the ground, his walking cane nearby, and a robber trying to take his watch. The armed man is seen striking a bystander wearing a bike helmet on the head with his gun as the man tried to intervene, causing him to fall.

Police didn’t immediately respond to messages seeking details about the victims’ injuries.

The two suspects got into a waiting vehicle driven by a third suspect and fled, police said.

Oakland detectives are investigating and have asked anyone with information about the attack to contact them.