Multiple people injured in Lancaster after a bus overturned, authorities say

Multiple people were injured after a bus overturned in Lancaster on Tuesday afternoon, authorities say.

The Los Angeles County Fire Department said it received calls around 11:17 a.m. about a crash involving a bus near Sierra Highway and Avenue C.

First responders reported that nearly 20 people were injured, including the driver of the bus, who was in critical condition at a hospital in the Antelope Valley. Among those hospitalized were two children and their mother, all of whom were airlifted to Northridge Medical Center, according to the California Highway Patrol.

According to Kern Public Works, the bus was operating on the Line 50 Route and belongs to Kern Transit.

Later Wednesday afternoon, authorities told CBS News Los Angeles that the crash was possibly caused when someone hit or threw an object through the bus's window.

A spokesperson from Union Pacific Railroads said crews were repairing damage done to the track.