A number of the attackers who carried out the November attacks in Paris used two apartments and a house in Belgium as possible safe houses in the weeks in leading up to the attacks, investigators said on Wednesday, according to Reuters.
All three were rented for a year, and paid in cash.
The tenants gave false identities, according to Reuters.
Investigators found DNA traces of one of the attackers, Bilal Hadfi, who blew himself up in Paris on November 13, the prosecutors said.
In the Charleroi apartment they found mattresses and fingerprints of both Hadfi and Abdelhamid Abaaoud, a Belgian who had fought in Syria and was believed to be one of the plot leaders.
Belgium has been conducting raids on terror targets ever since the November 13 ISIS attacks in Paris, particularly in the Molenbeek district of Brussels where the terrorists are believed to have come from.