Ten people were killed when two navy helicopters collided in mid-air during a Malaysian Navy parade military exercise.
One of the helicopters clipped the rotor of the other before crashing into the ground, according to footage released by local media.
The incident occurred at 09:30 local time (02:30 BST) in the Malaysian town of Lumut, which is home to a naval base.
No survivors are known.
“All victims were pronounced dead at the scene and their bodies were sent to police.” [Lumut] military hospital for identification,” the Malaysian Navy said.
It added that a committee would be set up to investigate the cause of the incident.
One of the helicopters, a HOM M503-3 with seven people on board, is believed to have crashed on the runway.
The other plane, a Fennec M502-6 carrying three other victims, crashed into a nearby swimming pool.
The state Fire and Rescue Department announced that it received a report of the incident at 9:50 a.m. local time (1:50 p.m. Japan time).
Malaysian Prime Minister Anwar Ibrahim said in a post on X (formerly known as Twitter) that “our people are mourning a heartbreaking and soul-rending tragedy” .
“My condolences go out to all the families of the victims and I wish them strength to face this tragedy,” he said.
In March, a Malaysian Coast Guard helicopter crashed into the sea off Malaysia's Angsa Island during a training flight.
The captain, co-pilot and two passengers were found by fishermen and rescued.