Alison-Madueke was minister from 2010 until May 2015 under
former president Goodluck Jonathan, who was defeated by Muhammadu
Buhari at the polls in March.
Buhari took office in May promising to root out corruption
in Africa's most populous country, where few benefit from the OPEC
member's enormous energy resources.
A police spokesman in London said he had no record of such
an arrest. The National Crime Agency did not immediately respond to a
request for comment.
But in a short statement on its website, the NCA said its
International Corruption Unit had arrested five people across London on
suspicion of bribery and corruption offences on Friday, without naming
the suspects.www.sweetgracey.blogspot.com