The storage tank is part of the oil pipeline system operated by the country.(Photos: VCG)

A large oil storage tank in Goyang, northwest of Seoul, likely exploded Sunday causing the facility to be engulfed in flames, Yonhap reported.

The local fire department said emergency service personnel are on site and trying to put out the flames.

"Because the explosion occurred when everyone was off, there are currently no reports of injuries," a source said.

It is said that the tank contained 77 million liters of gasoline.