A fire broke out at an SK Energy factory in Incheon Tuesday afternoon, but there were no casualties, the refining unit of the nation’s largest oil refiner SK Innovation said.

The fire started at around 3:17 p.m. at the factory for desulfurization and was put out about an hour later, fire authorities said.

<YONHAP PHOTO-1808> 인천 SK에너지 저유소서 화재 (인천=연합뉴스) 하사헌 기자 = 소방대원들이 26일 오후 인천시 서구 원창동 SK에너지 저유소 공정탑에서 일어난 화재를 진압하고 있다. 2011.4.26 toadboy@yna.co.kr/2011-04-26 17:22:00/ <저작권자 ⓒ 1980-2011 ㈜연합뉴스. 무단 전재 재배포 금지.>
Fire fighters put out a blaze at an SK Energy factory in Incheon on Tuesday afternoon.
Yonhap News
인천 SK에너지 저유소서 화재 (인천=연합뉴스) 하사헌 기자 = 소방대원들이 26일 오후 인천시 서구 원창동 SK에너지 저유소 공정탑에서 일어난 화재를 진압하고 있다. 2011.4.26 toadboy@yna.co.kr/2011-04-26 17:22:00/ <저작권자 ⓒ 1980-2011 ㈜연합뉴스. 무단 전재 재배포 금지.> Fire fighters put out a blaze at an SK Energy factory in Incheon on Tuesday afternoon. Yonhap News

Fire fighters put out a blaze at an SK Energy factory in Incheon on Tuesday afternoon.(Yonhap News)

The authorities and SK Energy officials are trying to find out the exact cause and assess the extent of damage.

“The fire broke out with a sound of an explosion. There were no casualties. We are trying to clarify the cause of the fire,” an SK Energy official said, declining to be named.

The Incheon Fire and Safety Management Department said that about 370 fire fighters, 50 fire engines and two helicopters were mobilized to extinguish the blaze.

By Song Sang-ho (sshluck@heraldm.com)