Mass Casualty Incidents | Slideshow

20 Injured in SoCal Bus Crash

01 / 04

Rollover Bus Crash

People were injured after a small tour bus crashed and rolled over on highway 330 approximately 2 miles north of the 210 freeway Sunday, May 22, 2016. Both directions of the 330 are currently closed. Cause of the crash is under investigation. (Will Lester /The Inland Valley Daily Bulletin via AP) MANDATORY CREDIT

02 / 04

Rollover Bus Crash

People were injured after a small tour bus crashed and rolled over on highway 330 approximately 2 miles north of the 210 freeway Sunday, May 22, 2016. Both directions of the 330 are currently closed. Cause of the crash is under investigation. (Will Lester /The Inland Valley Daily Bulletin via AP) MANDATORY CREDIT

03 / 04

Rollover Bus Crash

People were injured after a small tour bus crashed and rolled over on highway 330 approximately 2 miles north of the 210 freeway Sunday, May 22, 2016. Both directions of the 330 are currently closed. Cause of the crash is under investigation. (Will Lester /The Inland Valley Daily Bulletin via AP) MANDATORY CREDIT

04 / 04

Rollover Bus Crash

Approximately 20 people were injured, 4 with major injuries, after a small tour bus crashed and rolled over on highway 330 approximately 2 miles north of the 210 freeway Sunday, May 22, 2016. Both directions of the 330 are currently closed. Cause of the crash is under investigation. (Will Lester /The Inland Valley Daily Bulletin via AP) MANDATORY CREDIT