Yemeni tribesmen blew up the country’s main oil export pipeline on Thursday, forcing crude flows to stop, energy industry and tribal sources said, in the latest attack on a key source of foreign currency.

Yemen’s oil and gas pipelines have repeatedly been sabotaged, often by tribesmen who have feuds with the central government, causing fuel shortages and slashing export earnings for the impoverished country.

The sources said Thursday’s attack occurred in the area of Sirwah in Marib province, halting flows to export facilities on the Red Sea. […]