An arrest warrant issued for Nigeria's former oil minister Timipre Sylva by the country's anti-corruption agency is politically motivated, his spokesperson has said.

The Economic and Financial Crimes Commission (EFCC) has accused Sylva and others of diverting around $15m (£11m) of public funds intended for the construction of an oil refinery.

It issued a "wanted notice" on social media asking anybody with useful information about his whereabouts to get in contact.

Sylva's spokesperson Julius Bokoru said the former minister was in the UK for a medical check-up and would contact the EFCC on his return. He added that the refinery project was above board with "traceable documentation".

"The refinery project in question is a legitimate, transparent, and verifiable undertaking," he said.

He questioned why the EFCC had not got in contact with the former minister - and said that declaring him wanted on social media was intended to "inflame public sentiment".

According to the EFCC, its notice followed a warrant issued by a High Court in Lagos last Thursday.

Sylva served as petroleum minister from 2019 to 2023 under late former President Muhammadu Buhari - and was also governor of the southern oil-rich Bayelsa state from 2007 to 2012.