Six people died Sunday after two helicopters collided in western Rio de Janeiro, Brazil, according to local authorities.

The aircraft crashed in the parking lot of an electric car dealership following the mid-air collision. All occupants of both helicopters were killed in the incident.

Among the victims was singer Oliver Tree, who was 32 years old. Tree was identified as one of the six people who perished in the crash.

The collision occurred in western Rio de Janeiro on Sunday, though authorities have not yet released details about the cause of the accident or the circumstances that led to the helicopters colliding.

Local emergency responders arrived at the scene following the crash. The investigation into what caused the two aircraft to collide remains ongoing.