Sierra Leone’s anti-graft agency says its investigators have been forced to abandon a mission to interview former President Ernest Bai Koroma in his northern hometown of Makeni when his supporters blocked the road and threatened them on Thursday.

Koroma’s successor, President Julius Maada Bio, has led a campaign to call to account the previous administration that Maada Bio says took the country to the brink of economic collapse.

Koroma denies any wrongdoing and has said corruption allegations are part of a long-running smear campaign.

On Thursday agents from the Anti-Corruption Commission (AAC) were unable to access Koroma’s residence, which is among assets worth 200 million dollars the government has ordered Koroma and other officials forfeit or repay.

Koroma’s opposition All People’s Congress party denied there were any roadblocks, or that the crowd was hostile.