Nigeria, May 16 -- Dangote Petroleum Refinery has filed a fresh lawsuit against Nigeria's Attorney-General, seeking to overturn fuel import licences granted to oil marketers and the Nigerian National Petroleum Company (NNPC) Limited.

The legal action signals renewed friction in Nigeria's downstream oil sector, nearly a year after the refinery withdrew an earlier suit challenging similar import permits issued to the state oil company and several fuel traders.

According to a Reuters report, the new filing before the Federal High Court in Lagos asks the court to nullify import licences issued or renewed by the Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA).

Dangote argued that the approvals violate an earlier co...