The Sanchi collided with the Chinese cargo vessel CF Crystal about 160 nautical miles off the coast of Shanghai on Saturday, at about 8 p.m. local time (7 a.m. ET), according to Iran's Oil Ministry news agency, Shana. The 32 crew members of the Iranian vessel were missing, it said.
China's Ministry of Transport also reported the collision Saturday and said the Sanchi was on fire and that search and rescue operations were under way. It said oil was on the water.
"The accident caused oil tanker 'SANCHI' to catch on fire, tilting to the right, losing contact with the crew," it said. The ministry said that the tanker was still afloat and burning Sunday morning 9 a.m. local time: "Until now, 'SANCHI' is floating and still on fire. There are fuel stains on the sea, the rescue is going on."
Shana and China didn't report the cause of the crash.