NANNING, May 11 (Xinhua) -- Six primary school students who went for a swim in a river in southwest China's Guangxi Zhuang Autonomous Region have not been heard from since Wednesday afternoon. Two of them have been found dead, four remain missing.

The students from Qingshuikou Township Central Primary School in Beiliu City went swimming after school.

Frogmen aided the search over night, and found the two deceased.

The search continues.

The city government has asked schools to warn students of the dangers of strong river currents.