LOS ANGELES (AP) – A 2-week-old baby’s arm was torn off and six other people were injured when a car pursued by police crashed into another vehicle Tuesday, officials said.

A limb reimplantation specialist examined the boy and determined that his arm could not be reattached, said Dr. James Stein of Childrens Hospital Los Angeles. The boy was listed in serious, but stable condition.

The chase occurred in the Sylmar area after police responded to a report of a stabbing, said Officer Grace Brady, a police spokeswoman.

The suspects fled the stabbing scene and police broadcast a crime report at 2:20 p.m. describing a blue, compact vehicle seen leaving the area, Brady said. Other officers spotted a car matching the description and when the car did not stop, a two-minute chase ensued. The chase ended when the suspects ran a red light and struck a Ford Expedition carrying the baby and his parents.

The baby was thrown from the vehicle and his arm was severed just above the elbow, officials said.

The four men who were in the vehicle that fled police were taken to hospitals for treatment. Their conditions were not immediately available.

The baby’s 30-year-old father was taken to Henry Mayo Newhall Memorial Hospital where he was listed in serious condition, said Fire Department spokesman Bob Collis. The mother also was hospitalized but there were no details about her condition.

A 36-year-old man who had been stabbed was found at the original location where police responded. His condition was not immediately available.

Sylmar is in the northern San Fernando Valley.