ROSEBUD, S.D. (AP) – Rosebud Sioux tribal police say it’s not yet clear whether a man being chased by officers died after they opened fire on him or from injuries suffered when his vehicle went over a cliff.

Tribal police say they began pursuing the man Sunday evening after he drove away from his home where he was threatening his family in St. Francis. Authorities say the man drove onto an old gravel trail and was blocked by two police cars. The driver then rammed his vehicle into one of the police squad cars. Officials say the officers fired at the vehicle, which went over a cliff and rolled to the ground below.

The driver was pronounced dead at the scene. He has not been identified.

The FBI is investigating.

AP-WF-01-29-19 1229GMT