SEOUL, South Korea — A fire tore though an indoor shooting range in southern South Korea on Saturday, killing 10 people, including at least two Japanese tourists, and injuring six, police said.

Some people were on fire as they ran out of the building, Yonhap news agency quoted a witness as saying.

An official at the National Emergency Management Agency said authorities were struggling to identify the dead due to their burns, but a police official said at least two Japanese were confirmed killed and three other Japanese were presumed to have perished.

Nine Japanese tourists and their South Korean guide were inside the facility in the southeastern port city of Busan when the fire broke out on the second floor of a five-story building, police official Han Jong-seok said. He said it was not known how many other people were in the building at the time.

Yoo Seung-ho, a detective handling the case, said four other Japanese were being treated in hospitals.