Six people held over Brussels New Year's Eve attack plot

Belgian soldiers stand guard at Brussels' Grand Place. Credit: Reuters

Belgium's federal prosecutor has said six people have been detained during house searches in Brussels in relation to an investigation into a plot to carry out an attack on the city on New Year's Eve.

A judge is set to decide on Thursday whether they can be held further.

On Wednesday, Brussels cancelled its New Year's festivities and fireworks display due to the threat of a terror attack.

The city's Mayor Yvan Mayeur said the decision was taken following a risk analysis by its crisis centre.

"In these circumstances, we can't check everyone," Mr Mayeur told the French-language RTBF network.

Two other people arrested earlier this week will be held for a month after being charged with threatening to carry out a terrorist attack, prosecutors said.