The rotor blades of a helicopter that crashed into the roof of a Glasgow pub stopped spinning before the point of impact, investigators said.
The Air Accidents Investigation Branch (AAIB) said: "All main rotor blades were attached at the time of impact but neither the main rotor nor the fenestron tail rotor were rotating."
The AAIB said initial investigations showed no evidence of engine or gearbox failure.
The bodies of the nine people who died when a police helicopter crashed into a Glasgow pub have been released to their families.
The removal of a helicopter from a Glasgow pub has enabled emergency services to continue their search for victims of Friday's tragedy.
Emergency workers are searching the wreckage of a Glasgow bar a night after a police helicopter crashed through its roof during a concert.