Britain has agreed to send 4.2 million pounds ($5.84 million) recovered from a former state governor who was jailed for laundering money in Britain.

The 4.2 million pounds was stolen by Ibori and his associates but retrieved through operations led by British law enforcement agencies, who identified assets bought in Britain with illicit funds, the Foreign Office said in a statement.

The agreement builds on a 2016 memorandum of understanding that provides a framework for the return of stolen assets to Nigeria.

James Ibori, who was the governor of southern oil-producing Delta State from 1999 to 2007, pleaded guilty at London’d Southwark Crown Court in 2012 to 10 accounts of fraud and money-laundering.