SEOUL, South Korea (AP) — South Korea’s Yonhap news agency says an explosion at a subway station south of Seoul has left 11 people injured.

The news agency provided no other details Monday.

An official for the operator of the nation’s train network told The Associated Press that about 10 people received minor injuries in an incident but couldn’t verify whether there was an explosion. He says part of the train’s electrical insulation device was damaged.

The official spoke on condition of anonymity, citing office rules.