Belgian authorities have charged two people who were arrested after the Paris attacks with involvement in terrorism, prosecutors said Monday.

The pair were charged "with a terrorist act and participation in the activities of a terrorist group", while five others detained at the weekend were freed without charge, the prosecutor's office said in a statement.

It did not give the names of the people who were charged.

One of those released was Mohamed Abdeslam -- whose brother Brahim took part in the attacks and whose other brother Salah is being hunted by police.

The prosecutors confirmed that a major police raid in Brussels on Monday aimed at arresting Salah Abdeslam had ended without anyone being detained.