A police officer was sprayed with a corrosive chemical solution, currently presumed to be hydrochloric acid, at Seoul Gwanak Police Station, Monday morning, by a woman who visited the station to file a civil complaint.

Police said the woman, surnamed Jeon, 37, assaulted an officer of the Cyber Investigation Team on the third floor of the police station at around 8:45 a.m.

The attacked officer, surnamed Park, was taken to a nearby hospital for treatment.

In the process of restraining the woman, three other officers were also injured.

Jeon, who is presumed to suffer a mental condition, is under custody at the police station. Authorities are trying to determine the reason behind the attack.

By Lim Jeong-yeo (kaylalim@heraldcorp.com)