He shot both his girlfriend and her sister. He then took the girlfriend hostage.
"First, everyone thought it was a balloon that went off -- you know, in stores it happens sometimes," said Fabio Cebreros, a store customer. "But then after you heard two more shots randomly just go off; you heard them, probably within 30 seconds of each other -- pow pow. Then everybody just started chaos."
The gunman was holding a gun to his girlfriend's head in the back of the store. That's when police moved in and killed the suspect.
"One of our officers was able to get a good line of sight between him and the hostage and the shooter. And we were able to resolve the situation by the officer firing a round at the suspect," said Lt. Al Cheatham of the Chino Police.
The suspect was killed by police.
One of the victims was air lifted to a hospital. Police say both victims have non life-threatening injuries.