The largest oilfield in Libya resumed production late Tuesday.

The decision was announced by Mahmoud al-Kamudi, head of Libya’s Petroleum Facilities Guards, a few hours after the El-Sharara oilfield was forced to stop production as an armed group stormed the facility.

El-Sharara resumed production Sunday after a months-long hiatus.

The El-Sharara oilfield produces more than 300,000 barrels of crude oil per day, forming roughly one-third of the oil-rich country’s production.