Police in Santa Rosa on Thursday provided additional information regarding the investigation into a fatal shooting that left four people dead who were found Wednesday during a welfare check by officers.

Karen Squaglia, president of the Valle Vista management association, said a mother, her two adult children and a fourth person lived in the house.

Officers were sent to the Santa Rosa home for a welfare check on residents who had not been seen for several days, police said. When officers investigated, they discovered four deceased people.

A pedestrian was killed in a hit-and-run on Highway 101 in Santa Rosa Saturday night, the California Highway Patrol said.

Four people were found dead inside a Santa Rosa home on Wednesday afternoon, the Santa Rosa Police Department tells KRON4. Around 3:07 p.m., officers entered a home located on the 200 block of Monarch Court.

Police are on the scene of a shooting at a residence in Santa Rosa with four possible victims, according to Santa Rosa Police Sergeant Patricia Seffens.

Santa Rosa police are investigating the four people found dead in a home during a welfare check Wednesday afternoon as homicides.

Four people were found dead at a Santa Rosa home during a welfare check Wednesday afternoon, and authorities say they are investigating the case as a homicide. At about 3:07 p.m., officers responded to a home on the 200 block of Monarch Court to check on the residents,