A military helicopter has crashed in Qatar, killing all seven people on board, authorities in the Gulf state say.

They say all the bodies were found after the helicopter went down due to a technical malfunction in Qatar's territorial waters on Sunday.

Four Qatari military personnel, one Turkish serviceman, and two technicians from a Turkish defense company were on board, Qatar and Turkey say.

The cause of the crash, which occurred during a training exercise, is now being investigated.

Turkey has a military base in Qatar under a defense agreement signed between the two countries in 2014.

In a statement, Qatar's interior ministry confirmed that all seven individuals on the flight were found dead, extending its deepest condolences to the families of the victims.

Turkey's defense ministry indicated that the helicopter was conducting a training exercise as part of the Qatar-Turkey Joint Forces Command.

The two technicians were from the Aselsan defense corporation, with investigations to determine the precise cause of the crash underway by Qatari authorities.

This crash comes at a time of heightened tensions in the region, as the US and Israel continue their military operations against Iran, which has retaliated with attacks against US-allied states in the Gulf.