Two medical helicopters collided in midair Sunday afternoon near an northern Arizona hospital, killing at least seven people and critically injuring three, a federal official said.
All three people on one of the helicopters were killed in the collision in Flagstaff, including a patient and the pilot, said Ian Gregor, spokesman for the Federal Aviation Administration.
Four others were killed and three critically wounded, Gregor said. He wasn't sure if they were all on the second helicopter or whether some were on the ground.
The cause of the collision is being investigated.
The collision occurred near Flagstaff Medical Center. Hospital spokeswoman Starla Addair said she did not have any information to release.
After the helicopters crashed, they started a 10-acre brush fire that was later extinguished by Flagstaff fire, Coconino County sheriff's spokesman Gerry Blair said.
Two news helicopters collided while covering an auto chase last summer near Phoenix, killing all four people on board.