SACRAMENTO, Calif. >> The four people killed last week in a quiet Northern California neighborhood include a woman and her two children, authorities said today.

The victims are Angelique Vasquez, 45; her daughter, Mia Vasquez, 14; her son, Alvin Vasquez, 11; and Ashley Coleman, 21, according to the Sacramento County coroner’s office.

Detectives did not immediately know what relationship Coleman had to the Vasquez family, Sacramento Officer Matthew McPhail said.

Police found the victims Thursday when they broke into a single-story home in Sacramento after a relative reported that something might be wrong. Investigators treated the entire house as evidence, McPhail said.

Authorities arrested Salvador Vasquez-Oliva, 56, on suspicion of homicide after finding him in San Francisco, about 90 miles (145 kilometers) away from the killings. They have not named a motive or said what relationship he has to the dead. Police have not said when or how the victims were killed.

Sgt. Bryce Heinlein said Thursday that the killings don’t appear to be random.

It was not immediately known if Vasquez-Oliva has an attorney. He was being held in the Sacramento County Jail, Heinlein said.

Police said Vasquez-Oliva is from Sacramento, but records show he also is associated with an apartment near the University of San Francisco, six blocks from where police found him.

There was no answer at the door Friday, though a light was on inside.

The California Employment Development Department, which administers the state’s unemployment checks, said Vasquez-Oliva has worked as an office technician since 2014.