A serving detective from Scotland Yard's anti-corruption unit, who investigated corruption allegations against former governor of Delta State, Chief James Ibori, has been arrested for allegedly receiving payments from a firm of private investigators working for the former governor.
Two other detectives are also being investigated over the fraud.
Police Representative said one suspect, a 45-year-old detective constable, is being interrogate on suspicion of providing information about "Nigerian fraudster, James Ibori in return for cash.
Ibori, former Delta State governor, was sentenced to 13 years imprisonment last month after pleading guilty to laundering millions of pounds in the UK.
Also two former officers — now private investigators aged 53 and 58 — were also arrested on suspicion of bribery as part of a "pre-planned operation that forms part of a long and complex investigation.
A report published by The Guardian of London on Wednesday had claimed that a major investigation had been launched into the payments suspected to have the intent to pervert the course of justice.
The report quoted invoices seen by The Guardian to show how a private investigation firm made payments in return for confidential information on Ibori's case.
The London newspaper reported that Scotland Yard is investigating allegations that detectives working for its anti-corruption unit had been paid thousands of pounds by a firm of private investigators working for Chief Ibori.
A parliamentary inquiry was told on Wednesday that invoices, also seen by The Guardian, purport to show how a firm of private investigators made payments in return for information about the Metropolitan police investigation into James Ibori, described by the newspaper as "a notorious Nigerian fraudster.