SEOUL -- A fire broke out on a train of Subway Line 5 in South Korea's capital Seoul at about 8:47 am local time on Saturday. Fifteen passengers have been sent to hospital.

According to police and witnesses, a man presumed to be in his 60s or 70s carried a torch and a jerrycan on the subway, and allegedly set fire between Yeouinaru and Mapo stations. The suspect of arson has been arrested by police, according to Yonhap News Agency.

Passengers in the train have been evacuated. The on-site fire-fighting operation has been completed.