SHANGHAI, Aug 14 -- AT least 20 people were killed after an under construction bridge collapsed in central China's Hunan Province yesterday afternoon, Xinhua news agency reported.

Rescuers are searching for another 39 victims, Xinhua said.

The 320-meter bridge over the Jiantuo River in Fenghuang County collapsed at about 4:40pm yesterday.

Sixty-four people survived the accident while 22 of them were injured.

Hunan governor Zhou Qiang has reached the scene and the cause of the accident is under investigation, Xinhua said.

Fenghuang is a popular tourist destination.

The stone bridge was scheduled to open by the end of this month.