LAGOS - Nigeria's daily oil and gas production slumped during a brief nationwide strike by oil workers' union PENGASSAN that was called off on Wednesday after government-mediated talks with Dangote Refinery, according to an impact report seen by Reuters. The strike, which began on September 28, was called after the Dangote refinery, Africa's largest with a crude processing capacity of 650,000 barrels per day, dismissed more than 800 unionised staff. The NNPC had warned the disruption posed a "material threat to national energy security" if prolonged. Cargo loadings for Dangote refinery as well as at export terminals such as Akpo, Brass, and Egina were also delayed, risking demurrage costs, and at least five critical maintenance and project timelines slipped, the report said. The union suspended the strike after talks brokered by the government, easing immediate supply risks, though NNPC cautioned that systemic vulnerabilities remained.