The suspect, identified as 47-year-old Nurhan Venk, has since been arrested and booked into jail.
ARCADIA, Calif. (KABC) -- An innocent grandfather who was babysitting his 4-month-old grandson Wednesday evening was inadvertently shot when a gunman opened fire during a standoff with police in Arcadia, his son told ABC7.
The incident unfolded around 5:40 p.m. in the 2500 block of Greenfield Avenue.
Police said when officers arrived, 47-year-old Nurhan Venk was inside a home threatening his mother, 73-year-old Ankine Venk.
Police said Nurhan Venk went to his mother's home armed with handguns.
According to investigators, a 12-year-old boy and family member was inside the home during the shooting.
"As the officers were talking to the victim outside the house, they heard at least two gunshots come from inside," said police in a statement released Thursday afternoon.
Ankine Venk and the 12-year-old were able to get out of the house amid the gunfire, police said. The mother was injured, but police described her injuries as "non-life threatening."
Investigators said the officers didn't fire back.
Across the street, 83-year-old Zoo Ching Yang was inside his home with his grandson when a stray bullet came through a window and shot him in the face, according to the man's son.
"Everything's crazy. Someone called me and they go, 'Hey [your dad] got shot,' and I was like, 'Uh. How?'" said the son, who spoke with Eyewitness News Thursday but did not disclose his name.
The 4-month-old was reportedly on a bed with Yang and his grandmother when the bullet came piercing through the window.
"Everything happened so fast, so I didn't really have any, I guess, thoughts at this moment," said the victim's son. "In this moment in time, it's more like, how much stuff do I need to take care of. I need to obviously get access to the house because my mom's phone and wallet, everything's still in there."
He said before Wednesday's shooting, he and his family have heard arguments from the home before.
"It's always been known, because I think the cops came a couple times before," he said.
Meanwhile, an officer was also shot in the face during the incident and one other victim was hit by gunfire.
The officer, who joined the Arcadia Police Department about six months ago, and the two civilians were taken to a hospital for treatment.
A spokesperson for the Los Angeles County Sheriff's Department said they were all stable and are expected to make a full recovery.
A second officer was also rushed to the hospital with a reported ankle injury.
Nurhan Venk ultimately surrendered around 10:45 p.m., emerging from the home with a leg injury after possibly shooting himself, police said.
Investigators believe his gunshot injuries were accidental and self-inflicted.
He has since been arrested and booked on attempted murder of a peace officer and additional attempted murder charges.
Meanwhile, the Yang's son says he's still working to sort through the chaos to help take care of his family.