Di offices of Nigeria oil regulator and di state oil company don close because of nationwide strike wey di national oil workers' union start afta Dangote refinery sack more dan 800 of dia members, na wetin union officials tok.

Di strike wey start on Monday don increase tension for di African kontri wey be di biggest oil producer for di region. Di mata don turn legal and industrial wahala wey fit affect fuel supply and trade for di region, especially for countries wey dey depend on refined products from Nigeria.

Di workers for di privately-owned Dangote Oil Refinery, wey be di biggest for Africa, dem sack dem last Thursday because dem form union, na wetin Petroleum and Natural Gas Senior Staff Association of Nigeria (PENGASSAN) tok for one statement on Friday.

But Dangote oil refinery officials bin tok say di sack na part of staff reorganisation and dem accuse di affected workers say dem dey do sabotage.

Talks wey government officials mediate on Monday no fit settle di mata, and di refinery don get court injunction wey stop di union from blocking crude and gas supply to di refinery.

PENGASSAN tok say dem never receive di court notice formally. "Court order no dey serve through social media, na bailiff suppose bring am," na wetin union executive Lumumba Okugbawa tok.

Di strike don make di offices of NNPC Limited, Nigerian Upstream Petroleum Regulatory Commission (NUPRC), and Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA) close.

For one statement on Sunday, di regulator beg make dem settle di mata peacefully.

NNPC Limited tell Reuters say dem dey committed to maintain safe, stable and inclusive environment for work. "We dey monitor di situation well and we dey talk with di people wey dey involved to make sure say di mata settle well," na wetin spokesperson Andy Odeh tok for one statement.

Analysts dey fear say if di mata no settle and other unions join di strike, e fit scatter work for oil fields, stop free movement of products and cause wahala for petrol stations if trucks no fit move.

Di refinery wey Africa richest man Aliko Dangote get start operation dis year and dem don praise am as di one wey go change di game for Nigeria fuel import.

But di wahala fit make investors no trust di system again and e dey raise question about how dem dey protect workers for Nigeria private sector.