A narrow-gauge train overturned Wednesday in a mountainous region in southern Taiwan, killing at least five tourists from the Chinese Mainland, with one missing. 61 other people were injured, with 23 in serious condition.

Taiwan authorities say the accident occurred after a large tree collapsed on the path of the train. Seven helicopters have been sent to the scene. The Mountain Ali rail line, running east from the southern city of Chiayi, corkscrews through a series of steep mountains and has long been one of Taiwan's premier tourist attractions. A serious overturn accident took place along the same rail line in 2003 killing 17.