A former Minister of Petroleum, Diezani Alison-Madueke has been charged with bribery offences by the police in the U.K.

According to Reuters, the UK police on Tuesday, August 22, said they suspected she had accepted bribes in return for awarding multi-million-pound oil and gas contracts. Alison-Madueke, 63, was a key figure in the administration of former President Goodluck Jonathan, serving as petroleum minister from 2010 to 2015.

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She also acted as president of the Organization of the Petroleum Exporting Countries (OPEC).

“We suspect Diezani Alison-Madueke abused her power in Nigeria and accepted financial rewards for awarding multi-million-pound contracts,” said Andy Kelly, Head of the National Crime Agency’s (NCA) International Corruption Unit.

“These charges are a milestone in what has been a thorough and complex international investigation.”