At least four people are dead, and three others critically injured after two helicopters collided on Australia's Gold Coast near a Sea World theme park Monday afternoon.

Police said the crash drew emergency aid from beachgoers who had been enjoying the water during the southern summer. Police official Gary Worrell said people on Jet Skis, family boaters and others rushed to help.

Queensland Police confirmed the crash via Twitter, but did not provide details.

"Seaworld Drive in Main Beach has been closed off due to a helicopter crash. Motorists and pedestrians are urged to avoid the area," the agency said in its tweet.

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This image made from a video shows sand bank with crashed helicopter on Gold Coast, Australia Monday, Jan. 2, 2023. Two helicopters collided Monday afternoon over the Australian beach.

This image made from a video shows sand bank with crashed helicopter on Gold Coast, Australia Monday, Jan. 2, 2023. Two helicopters collided Monday afternoon over the Australian beach. (Australian Broadcasting Corp. via WHD)

The Queensland Ambulance Service said 13 patients were being assessed, according to 9News Australia. 

Police confirmed to the outlet that one of the helicopters was able to land successfully after the aircraft "came into contact with each other." 

Footage of the crash showed a helicopter shortly after takeoff being clipped by another helicopter flying over the water, according to the .

Pictures and video from the scene show wreckage covering a sand island close to the coast. Numerous emergency personnel were seen on the sand island assisting with the incident.

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Queensland Premier Annastacia Palaszczuk called the accident an "unthinkable tragedy."

The Australian Transport Safety Bureau was investigating the collision, chief commissioner Angus Mitchell said.

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The Gold Coast region is at its busiest in January, the peak time for holidays in Australia's summer.

The contributed to this report.