Oly Ilunga, who resigned as DR Congo health minister last month, has been questioned as part of an inquiry into the use of public funds earmarked to tackle the Ebola epidemic.
The former minister’s evidence was heard by the attorney general and “trusts in the justice system of his country.
A judicial source said Ilunga had left “freely”.
Three of the minister’s former co-workers, including a doctor, were held in custody the source added.
The hearings were part of a preliminary inquiry “into the management of substantial funds provided by the government for the battle against the Ebola virus”, which has claimed almost 2 000 lives.
