Conflicting reports on how Summit Fire started in Antelope Valley

As fire crews work to fully extinguish the Summit Fire in the Antelope Valley community of Llano, there are conflicting reports on how it may have started.

The assistant chief of the San Bernardino County Fire Department, says the fire was started by illegal fireworks. But CalFire says the cause remains under investigation.

The fire, which has been burning since Friday, is now 72% contained after burning 2,690 acres.