Nigeria, Sept. 28 -- The feud between Dangote refinery and many other key players in the downstream petroleum sector deepened on Saturday as an oil union, the Petroleum and Natural Gas Senior Staff Association of Nigeria (PENGASSAN), asked its members to disrupt activities at the refinery by blocking gas supply to it.

Gas is a major fuel that powers some of the equipment at the refinery. PENGASSAN, in a letter to some of its members on Saturday, asked them to stop such gas from getting to the refinery.

The association said its decision comes in response to the refinery's management disengaging union members and allegedly spreading misinformation to justify their actions.

"All crude oil supply valves to the Refinery should be shut. The ...