Belgian prosecutors say that DNA has identified an accomplice of captured Paris attacks suspect Salah Abdeslam.
The man is named as Najim laachraoui, 24, still on the run. A statement said he had been using false ID and that his DNA had been found in houses used by the suspected jihadist network.
Abdeslam was captured in Brussels on Friday and is still being interrogated.
French President Francois Hollande will later meet relatives of some of the 130 killed in the 13 November attacks.
Meanwhile, Abdeslam’s lawyer has denied Belgian media reports the suspect will become an informer in return for more lenient treatment. So-called ISIS said it was behind the Paris attacks.
The Belgian prosecutor’s statement said that last September Abdeslam had travelled twice to the Hungarian capital Budapest, using a rental car. In the car were two other men, using fake Belgian identity cards with the names Samir Bouzid and Soufiane Kayal.
Soufiane Kayal has now been identified as laachraoui by DNA found at houses in the town of Auvelais and the Brussels district of Schaerbeek.