Cambodian Prime Minister Hun Sen early Tuesday announced Nov. 25 as the national mourning day to commemorate those people killed in a stampede during water festival.

People stand near the bodies of the stampede victims in Phnom Penh, Cambodia, Nov. 23, 2010. At least 339 people were killed in a stampede on Monday night as millions of Cambodians celebrated the annual water festival in the capital Phnom Penh, Cambodian Prime Minister Hun Sen said on state TV early Tuesday. The accident took place on a bridge that connects the city with the Diamond Island which has become the center of celebrations. [Xinhua/Phearum]

The death toll has increased to 339 with other 329 people injured in a stampede in the capital Phnom Penh on Monday night as millions of Cambodians celebrated the last day of the three-day annual Water Festival, Hun Sen said in a live televised speech.

"This is the biggest death toll since Pol Pot regime and even flood has never inflicted such a high death toll," he said. " Urgent investigation showed that it has nothing to do with terrorism."

"Taking this opportunity, I would like to express my condolence to all victims and their relatives," Hun Sen said.

Meanwhile, he urged the doctors to do their best to save the injured people and ordered investigation into the cause.

A special committee has been set up to investigate this horrific accident.

The accident took place on a bridge that connects the city with the Diamond Island which has became the center of celebrations.

Sar Kheng, deputy prime minister and minister of interior, has rushed to the scene.

A Chinese Embassy official told Xinhua by phone that there hasn't been any report of casualties of Chinese citizens.

The Water Festival from Nov. 20 to 22 is the largest annual festival in the Southeast Asian nation, with over two million Cambodians converging to the city to enjoy boat race, concerts and fireworks.