Nigeria's anti-graft agency has arrested two former governors accused of corruption and money laundering.
Orji Kalu denies money laundering allegations
Saminu Turaki, a sitting MP and Orji Kalu, who lost a bid for Nigeria's presidency in last April's polls were arrested in Abuja, officials say.
The Economic and Financial Crimes Commission (EFCC) had invited almost all of Nigeria's 36 former governors for questioning over graft allegations.
Mr Kalu and Mr Turaki were the only two that refused to turn up, the EFCC says.
Sule Lamido, who succeeded Mr Turaki as governor in Jigawa State, had recently alleged that the former governor left him an empty treasury when he stepped down last May.
Mr Turaki denies the allegations and says his successor is merely "playing politics".
The EFCC has also accused Orji Kalu of money laundering and diverting public money into family businesses, accusations the former governor flatly denies.