Yemeni employees speak as they stand outside the Aden oil refinery in Yemen's port city of Aden on September 29, 2015, the day after it reopened following a six-month halt of service due to clashes between Popular Resistance Committees and Shiite rebels. AFP PHOTO / SALEH AL-OBEIDI

Yemen’s 150,000 barrel-per-day Aden refinery resumed operations on Tuesday after being shut for more than five months as the conflict in the country worsened, an industry source at the refinery told Reuters.

“The refinery is back online and is refining crude it had in storage from before,” the source said, adding the refinery was now operating at half of its processing capacity.

The plant, in the southern city of Aden, was shut in April and Aden Refinery Company declared force majeure on its oil imports and exports in the same month.

Saudi Arabia and other Sunni Muslim Arab states launched a military campaign in Yemen in March to drive back Houthi forces and restore a government which fled into exile.