A family tragedy unfolded Thursday in the East Bay city of Pittsburg.
Police said they were called to a home on Jack London Court at 4 a.m. after a man called saying he had hurt his family and was going to kill himself.
When they finally entered the home five hours later, police found four bodies inside. They are all members of the same family, according to reports.
Pittsburg police Lt. Ron Raman said two bodies were in one bedroom and the other two were in a second bedroom.
Police said they immediately set up a perimeter around the home following the 911 call. They spent the morning trying to reach the man.
"We did not know what the mindset of this individual was," Raman said. "We didn't want to put officers at risk."
Police did not identify them but said a 39-year-old male was found with a gunshot wound to the head.
A 73-year-old man, a 68-year-old woman and a 35-year-old woman all died from gunshot wounds.
Police said the 39-year-old man is believed to be the shooter.
Police he was apparently despondent over the loss of a job and financial issues.
A neighbor told NBC Bay Area Traci Grant the man killed his wife and her parents. Apparently the in-laws were visiting from the East Coast. The younger couple did not have any children, according to neighbors.
Another neighbor, Francine Skedsmo, told Bay City News she had known the family for years and was unaware they had any problems.
She said that they had recently thrown a Halloween party with a trampoline in the yard, and had been giving out candy to trick-or-treaters.
"They were a wonderful couple," Skedsmo said. "I'm shocked that this happened."