Police raids have uncovered a nail bomb, chemicals that could be used to make more bombs, and a black flag of the so-called Islamic State group, in a house in the Schaerbeek neighbourhood of Brussels.

The raid in Schaerbeek reportedly followed a tip-off from a taxi driver who had driven three suspected bombers to the airport in Brussels.

Thirty-four people were killed in bomb attacks at the city's main airport and a metro station.

Anna Holligan reports from Schaerbeek.