Nigeria’s main militant group has said that it sabotaged one of Chevron‘s crude oil pipeline junction points in the Niger Delta.

The Movement for the Emancipation of the Niger Delta (Mend) said that it blew up Chevron’s Okan manifold in the southern Delta state late on Sunday, hours after it attacked an oil well head operated by Royal Dutch Shell, Reuters reported.

It was not immediately possible to independently verify the statement and Chevron officials were not immediately available to comment.

Chevron, Shell and Italian energy company Agip have shut about 273,000 barrels per day of oil production in Nigeria following the latest string of attacks by MEND since May this year.