KXTV-TV, Sacramento

SACRAMENTO — A 56-year-old man was arrested Friday in connection with the slayings of four found at a Sacramento home a day earlier.

Salvador Vasquez-Oliva, of Sacramento, was detained Thursday in San Francisco, about 90 miles west. Vasquez-Oliva is in custody at the Sacramento County Main Jail, said police spokesman Sgt. Bryce Heinlein.

Vasquez-Oliva is being held on homicide charges. Bail has not been set.

Police found the four bodies while conducting a welfare check Thursday. A relative asked police for the check because they believed something was wrong.

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The Sacramento County Coroner's Office confirmed that the victims were two adults and two juveniles.

Police have not released the names, genders or ages of the victims or of any relationship to the suspect. He was likely known by the victims, Heinlein said. Police haven't determined a motive for the killing.

Police don't believe the incident was a random act, said Sacramento Police spokeswoman Officer Linda Matthew.

On Thursday, Vasquez-Olivia of Sacramento was quickly singled out by investigators.

The deaths in the South Land Park area of Sacramento are the first homicides in the area since 2010, according to Sacramento police online data.

The area is a small community with a mix of families and older residents, data from the housing website Trulia showed.

A neighbor, Rita Munoz, told the Sacramento Bee that a couple with children ages 11 and 14 live in the house.

The mayor issued a statement, calling the crime horrifying and extremely tragic.

It was unclear when the victims were killed, Heinlein said. Police also weren't saying how they were killed.

There were no reports of shots fired or other problems at the home until the relative called police to report concern, Heinlein said.

Contributing: The Associated Press. Follow KXTV-TV on Twitter: @ABC10