Colorado ? A small plane clipped the towline of another plane pulling a glider Saturday, sparking a fiery midair crash in Colorado and killing three people, authorities said.

The glider disconnected from its tow plane just before the collision that sent both planes plummeting to the ground, Boulder County sheriff’s office spokesman Rick Brough said.

The glider landed safely — with no injuries to any of the three people on board — after the two planes made impact, authorities said.

“We understand the glider went through a fireball after the impact,” NTSB field investigator Jennifer Rodi.