WESTFIELD — Thirteen people were injured, at least four seriously, after an SUV collided with a bus carrying senior citizens and flipped the shuttle onto its side on Wednesday morning.

According to the Westfield Police Department, the crash occurred at approximately 10 a.m. on 151st Street under U.S. 31 and involved an assisted living shuttle bus and a 2010 Cadillac SRX SUV.

Police said the collision between the vehicles left the Cadillac’s front end heavily damaged and caused the shuttle bus to flip onto its side.

A total of 12 passengers were aboard the shuttle bus at the time of the crash, police said.

Five bus passengers were transported from the scene by ambulance while a school bus was used to transport another five passengers to a hospital. One remaining passenger was transported to a hospital via personal vehicle.

Police said that as of 4:30 p.m. on Wednesday, four of the shuttle bus passengers were reported to have sustained serious injuries while seven were said to have minor injuries.

The driver of the SUV was treated and released on scene.

Westfield and Carmel fire departments also responded to the scene of the crash as did several other agencies.