The Organisation of Petroleum Exporting Countries (OPEC) said on Thursday that crude oil production in Nigeria rose by 274,000 barrels per day in April, Premium Times reports.

The increase, OPEC said, represents the biggest increase among countries within the oil producers’ group. According to OPEC’s latest Monthly Oil Market Report for May released on Thursday, Nigeria’s output was put at 1.484 million bpd for April, from 1.21 million bpd in March, which was based on direct communication.

Meanwhile, Angola saw its oil output decrease to 1.651 million bpd in April, from 1.652 million bpd in the previous month. But the country still retained its status as Africa’s top oil producer, after taking over from Nigeria recently. The cartel is billed to meet in Vienna later this month, to discuss a possible extension of output cuts.