Three people, all members of a family, died in a car accident Saturday just outside West Portal Station in San Francisco.

The accident occurred around 12:30 pm Saturday, as NBC Bay Area reports. According to the San Francisco Fire Department, the single-vehicle crash involved an SUV that slammed into a family of four at a bus stop at West Portal Avenue and Ulloa Street.

The San Francisco Department of Emergency Management advised residents to avoid the area.

According to the SFFD, one person died and three people were injured, one of the critically.

A social media user on the scene, as seen below, suggested that two people were killed.

Update: By Sunday afternoon, three of the four victims, all members of a family, had died. The only surviving member of the family was an infant, who remains in critical condition.

As KPIX reports, the victims were named Diego, 40, and his wife, Matilde, 38, but we do not yet know their last name. They were reportedly out celebrating a wedding anniversary as a family, and the third victim was a one-and-a-half-year-old toddler, a boy.

A single driver believed responsible for the crash was arrested on manslaughter charges. She has been identified as 78-year-old Mary Fong Lau.