A fishing boat and nine sailors onboard were left missing after losing contact with their colleagues on another boat off east China's coast early Sunday morning, local authorities said.
The two boats, both from southeast China's Fujian Province, have been fishing side by side off the coast of Ningbo, eastern Zhejiang Province since Saturday, said a spokesman with the Zhejiang Maritime Search and Rescue Center.
Sailors aboard one of the two boats, "Minxiayu 1136", called the police early Sunday morning after they found "Minxiayu 1121" had lost touch with them, the spokesman said.
Only a sailor who fell into water from the missing boat were rescued at about 10:00 a.m. by a freighter passing by from the Republic of Korea (ROK), the spokesman said.
More than 10 boats and a helicopter have been dispatched to search the area, but no traces have been found, he said.
"No SOS signals have been received from the missing boat, so we're not clear about what had happened to that boat," he said.
The Ningbo Maritime Affairs Bureau has sent staff members to find the ROK freighter which is now in Shanghai to get more information, he added.