Authorities in southwestern Iowa say two people from Minnesota died in a helicopter crash late Tuesday afternoon.

The Audubon County Sheriff’s Office reports the names of the victims are being withheld pending notification of family.

Witnesses have said the copter hit a power transmission line before crashing into the ground and bursting into flames. Debris from the crash struck a passing, nearby pickup truck, but no one in the vehicle was hurt. Additional details about the cause of the crash remain under investigation by the FAA and other agencies.