Rescuers worked frantically Friday to locate more than 100 people missing from a boat that sank after hitting a rock in a southwest China river, an official report said Friday. It said four people were killed.

Sixteen crew members and 132 passengers were rescued after the accident Thursday, China News Service said in a report appearing in Hong Kong newspapers.The survivors included 129 men and 19 women, the news service said in a report from Chengdu, the capital of Sichuan province, about 930 miles southwest of Beijing. Six people required hospitalization.