Disturbing footage shows Marjory Stoneman Douglas High students as gunshots ring out in the building

CBS Evening News on Wednesday aired disturbing footage from inside Marjory Stoneman Douglas High, as shots rang out in the school building,

The footage shows high school students cowering as gun shots explode.

Watch the video below:

JUST IN (warning, disturbing video): Cell phone video inside the school as shots were going off at Marjory Stoneman Douglas High https://t.co/wHWo6XjccXpic.twitter.com/3ovf5LhzBs

— CBS Evening News (@CBSEveningNews) February 14, 2018