Beginning of tornado that quickly turned into F4 in Oklahoma

This video was taken just miles away from a tornado that flattened parts of Oklahoma on Monday afternoon.

The start of the tornado can be seen forming in the sky all the way through it landing and spinning across the ground.

Many neighborhoods, shopping malls and schools were leveled. Cars and trucks were left crumpled on the roadside.

At least 24 people were killed, including at least seven children, and those numbers were expected to climb.