A fire on board an MTR train from Admiralty to Tsim Sha Tsui station was caused by a man?

on board an MTR train = 在MTR電車上面(的)(火災)

A fire on board an MTR train from Admiralty to Tsim Sha Tsui station was caused by a man.==這場火警是由於一位男子在乘坐地下鐵路列車從金鐘至尖沙咀站時縱火引起. be on board==be in a ship;在船上; go on board==go on to a ship or into an airliner;上船或上飛機, Yip