BRUSSELS  —  Belgian police arrested nine people in Brussels today (Nov 19) during nine raids connected to the Paris attacks, prosecutors said.

Seven people were arrested during six raids linked to French national stadium bomber Bilal Hadfi, while the other two arrests were also linked to last Friday's attacks, the federal prosecutor's office said in a statement.

In the six raids in the Brussels region, the prosecutor's office told AFP the raids targeted places "linked to Bilal Hadfi", the 20-year-old who died when he set off his explosives last Friday, in Brussels as well as the suburbs of Uccle, Jette and Molenbeek, which is dubbed a haven for extremists.

The prosecutor added that the raids targeted places involving Hadfi's family, friends and other people directly linked to him.

Police would not say if any arrests were made, Reuters reported.

Hadfi was one of three assailants who blew themselves up outside the French national stadium, killing one person, as France was playing Germany in a football friendly attended by 80,000 fans, including French President Francois Hollande.

Investigators say Hadfi was a French national who was living in Belgium and had spent time in Syria. "It's a case which has already existed in 2015, following Mr Hadfi's departure for Syria,"  a source in the prosecutor's office said.

Police also detained one person in a separate raid in Laeken, a suburb northwest of Brussels, in connection with the Paris attacks but not with Hadfi, the source added.

The person's role in the attacks "remains to be seen," the source said. 

Meanwhile, French Prime Minister Manuel Valls is warning that the associates of extremists who targeted France last week could use chemical and biological weapons, as he urged Parliament to extend a state of emergency. He presented a bill extending the state of emergency declared after last Friday's attacks for another three months to the lower house of Parliament today (Nov 19). It goes to the upper house tomorrow.​

Mr Valls said "terrorism hit France, not because of what it is doing in Iraq and Syria ... but for what it is." He added, "we know that there could also be a risk of chemical or biological weapons." AP/AFP/REUTERS