Chinese state media CCTV showed pictures on Sunday of the tanker ablaze and billowing plumes of thick dark smoke. China sent four rescue ships and three cleaning boats to the site, while South Korea dispatched a ship and a helicopter. The US Navy sent a military aircraft to assist with the search, China Daily reported on Monday. "It was not known if any of the tanker's missing 32 crew members had been rescued," said the coast guard official, who declined to give his name as he was not authorised to speak to media. He was speaking as of 8 AM Korean time (2300 GMT, Sunday).