TAIPEI, April 27 (Xinhua) -- A small train overturned in Taiwan's Ali Mountain area on Wednesday, killing five tourists from the Chinese mainland and seriously injuring at least 23 passengers who are members of five mainland tour groups.
One person is missing, according to Taiwan authorities.
Helicopters have been dispatched to the accident site and the injured have been sent to hospitals in Chiayi.
Witnesses say a tree had fallen over the railway line, which caused four of the train's carriages to overturn.
Liu Kezhi, director of the Cross-Strait Tourism Association's Taipei office, has reported the accident to the association and asked Taiwan to make its best efforts to take care of the injured mainland tourists.
Liu will be visiting the accident site together with his colleagues.
Among the dead are three people from southern Guangdong Province -- Ye Yinxian, Ye Qiongzhen and Peng Zhenqu, and two from southwestern Sichuan Province -- Chen Daohua and Zhuo Peiqun, according to Taiwan authorities.
Ali mountain, or Alishan, is one of Taiwan's premier tourist attractions for mainland tourists. A similar train accident occurred near to that of Wednesday's one nine years ago, killing 17 and injuring more than 150 people.
The Alishan rail line, running east from the southern city of Chiayi, goes through steep mountains.
According to Taiwan authorities, 1.82 million mainland tourists visited the island on tour packages from July 2008 to the end of 2010.
Last October, 19 tourists from southern coastal city of Zhuhai, Guangdong Province, went missing after their bus was hit by a landslide during a storm in northeast Taiwan.