Police found traces of explosives, handmade belts and the fingerprint of a key Paris attacks fugitive during a raid on an apartment in Brussels in December, Belgian federal prosecutors have said.
Prosecutors said that the apartment in the Brussels district of Schaerbeek had been rented under a false name that might have been used by a person already in custody related to the Paris attacks.
The find adds to indications that the 13 November shooting and suicide bomb attacks were at least partially planned in Belgium.
130 people were killed in the Paris attacks.
Two of the attackers had been living in Brussels and Belgian authorities have arrested ten people, including one who rented the apartment, in Schaerbeek.
Investigators also found a fingerprint of Salah Abdeslam, the brother of one of the attackers, who returned from Paris the morning after the attacks and has still not been found.
Many of those arrested in Belgium have links to Abdeslam, including two who drove from Brussels hours after the attacks to pick him up and another who drove him from one part of Brussels to Schaerbeek after his return.