Further to the breaking news that Eamonn picked up on earlier here

Most news agencies now reporting that heavy shooting has been heard in the northern Paris suburb of Saint Denis and reports say a large scale police operation, linked to last Friday's attacks, is under way there

French TV say that some police have been wounded and that there are a number of armed terrorist suspects holed up in an apartment

The BBC further report that a French journalist in St-Denis, Djamel Mazi,states that two or three men have barricaded themselves into an apartment in the centre of the suburb. He also says people are being evacuated from the local area.

More from the Beeb here

We'll bring you more as it happens and markets will remain in cautious mode

Update: 05.50 GMT

Radio Monte Carlo is reporting that Abdelhamid Abaaoud, the alleged mastermind of the Paris attacks, is the focus of the police operation in Saint Denis. The report is unverified.

Shooting is reported to have stopped in the past 15 minutes

Latest images from Paris- Police operation under way