Belgian authorities have charged two people with supplying fake documents to a militant from the so-called Islamic State group who was involved in the November 2015 attacks in Paris and who later carried out a suicide bombing on the Brussels metro, prosecutors said this morning.

The pair, a man and a woman, were "suspected to have provided Khalid Bakraoui with the false documents afterwards used in preparation of the Paris attacks," which were claimed by the so-called Islamic State group and killed 130 people, prosecutors said.

Bakraoui was the suicide bomber at a Brussels metro station while his brother Ibrahim and another man attacked Brussels airport in coordinated suicide attacks that killed 32 people on 22 March last year.

Belgian press reports said the suspects identified Thursday as Farid K and Meryem EB were the same people who were arrested during an anti-terror raid on a home in the Brussels district of Laeken on Tuesday.

Farid K has "been charged with participation in the activities of a terrorist group, falsification of documents and use of false documents," the prosecutor's office said.

Meryem EB "has been charged with falsification of documents and use of false documents," it said.

Farid K has been placed in police custody while Meryem EB was released under "strict" conditions, it added.

Some 20 people have been charged in Belgium in connection with the Paris attacks. Investigators say the Paris and Brussels attacks were carried out by the same cell.

They also said Bakraoui used a false name to rent an apartment in the southern Brussels district of Forest that was raided one week before the metro and airport bombings.

A French woman police officer and three Belgian colleagues were wounded in the 15 March shootout at the apartment in which an Algerian Islamist suspect was killed.

Police found in the apartment the fingerprints of Paris attacks fugitive Salah Abdeslam, the only known jihadist to have survived the massacres there, and arrested him three days later in central Brussels.

Prosecutors also believe Bakraoui used a false name and Belgian identity card to rent a flat in the southern Belgian city of Charleroi which served as a base for the Paris attackers.