A fire broke out at Yemen's Aden Refinery after an overnight blast, a local official told the Yemen Post on Friday.
A bomb was exploded at the pipeline which carries crude and fuels from the refinery's terminal, Al-Zait Port, to the refining facility triggering the fire which the authorities are now bringing under control, the official said.
There were no casualties and damage to infrastructure is yet to be assessed, the source added.
The refinery is Yemen's largest which used to process around 100.000 b/d before the current chaos. It resumed operations months ago after a months-long shutdown forced by conflict.
Today's incident came as the local authorities in Yemen's temporary capital of Aden are facing huge security challenges including a rise in targeted killings, explosions and presence of militant groups such as Al-Qaeda and ISIS.
In the past two days, five policemen were killed in separate attacks the latest in a series of targeted killings since Aden was retaken from the Houthi militants in mid-2014.
ISIS has claimed responsibility for many of assassinations and blasts as the group is continuing to take advantage of the ten-month conflict to expand in many parts of Yemen.
ISIS has also been responsible for deadliest attacks in the capital Sanaa which has been controlled by the Houthis since the government was ousted in late 2014.