Thirty-two crew members have been reported missing after two vessels collided off China's east coast on Saturday evening, state media reported on Sunday. The collision, between the Panama-registered Iranian oil tanker Sanchi and the Hong Kong-registered bulk freighter CF Crystal, happened about 8pm on Saturday in the East China Sea, about 160 nautical miles east of the Yangtze River Delta, Xinhua said, citing China's Ministry of Transport. The missing crew members - 30 Iranians and two Bangladeshis - were all from the oil tanker, the report said, adding that the 21 members of the freighter's crew - all Chinese nationals - had been rescued. After the collision a fire broke out on the tanker, which was still burning as of 9am Sunday, the report said. Chinese maritime authorities have dispatched eight vessels to support the search and rescue effort, while South Korea, after coordinating with the China Maritime Search and Rescue Centre, has sent a coastguard ship and a fixed wing aircraft to assist. The tanker, owned by an Iranian shipping company, was carrying 136,000 tonnes of refined oil to South Korea from Iran, the Xinhua report said. The Hong Kong-registered freighter is owned by a company based in eastern China's Zhejiang province and was transporting grain from the United States to the southern China province of Guangdong.