JINAN, May 9 (Xinhua) -- Twelve people were killed and one another was seriously injured in a vehicle crash and a subsequent fire in a tunnel in Weihai City, east China's Shandong Province, Tuesday morning.

　　The accident occurred at about 9 a.m. in the tunnel in Huancui District of Weihai when 13 people were aboard the vehicle, local authorities said, without revealing the identities of the victims.

　　An investigation into the cause of the accident is under way.