Paris attacks suspect Salah Abdeslam has been hit with preliminary charges of terrorist murders and possession and use of bombs and weapons, his lawyer said.

Salah Abdeslam, a key suspect in the Paris terror attacks, has been handed over to French authorities, Belgian prosecutors have said.

Salah Abdeslam, a prime suspect in the Paris attacks, had documents about the German nuclear research centre, Juelich. 

The chief suspect in last year's deadly Paris terror attacks is due to appear in court in Brussels, amid increasing signs that the same cell of the so-called 'Islamic State' group was behind attacks in both cities.

The only suspected participant in the November 13 Paris attacks to be captured alive has been co-operating with police investigators and is “worth his weight in gold”, his lawyer said.

Authorities do not know the "exact path" taken by Salah Abdeslam, a key suspect in the Paris attacks, a Belgian federal prosecutor said.

The top suspect in last year's deadly Paris attacks had planned to be a suicide bomber at France's main stadium but backed out at the last minute, according to prosecutors.