Yongxin IMO 8967436, dwt 4300, built 1985, flag Cambodia, manager DL East Shipping Dalian China. (FILEPHOTO)

Two Chinese fishermen went missing after their fishing boat sank on Friday after colliding with a Cambodia-registered ship in the East China Sea off Zhejiang Province.

The accident occurred at 4:20 a.m. off the waters of Yuhuan County in Zhejiang's Taizhou City, where the Cambodian ship, which was loaded with 4,100 tonnes of silica sand, hit the fishing boat, according to a spokesman with the Taizhou Marine Fisheries Bureau.

Rescuers are still searching for those missing, who were believed to be a couple, according to the spokesman.

The Cambodian ship, named "Yongxin," departed on Saturday from Danang, Vietnam and was on its way to the port of Chinhae in the Republic of Korea.