DH, which first reported the story, also said the man detained in the Anderlecht district had been misidentified. Police and prosecutors have been declining all comment but will hold a news conference at noon GMT.
Grieving Brussels holds vigil at historic city square
The two suicide bombers who carried out the attacks in Brussels airport on Tuesday were brothers Khalid and Brahim El Bakraoui, Brussels residents known to the police for crime, the RTBF public broadcaster said, quoting an unnamed source.
Khalid, under a false name, had rented the flat in the Forest borough of the Belgian capital where police killed a gunman in a raid last week, RTBF said.
Investigators found after that raid an Islamic State flag, an assault rifle, detonators and a fingerprint of Paris attacks prime suspect Salah Abdeslam, who was arrested three days later.
Around 35 dead as blasts rock Brussels airport, metro
Both brothers have a criminal records, but have not been linked by the police to terrorism until now, RTBF said.
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