The brothers who are suspected of carrying out Wednesday's shootings at the offices of satirical Charlie Hebdo on Wednesday are reportedly holed up in a printworks building on the outskirts of Paris.
It is thought police are on the scene in Dammartin-en-Goele, about 25 miles north east of Paris and about six miles from Charles de Gaulle airport and that negotiations are underway with Said and Cherif Kouachi, according to reports.
Earlier, police and the suspects were involved in a car chase on the A2 motorway.
The men are understood to have taken a hostage or hostages, and negotiations are concentrating on securing their release.
The French prosecutor denied an earlier report that a person was killed in thos morning's developing events.
Latest updates on #ParisAttack manhunt as armed police seal off industrial estate near Paris http://t.co/CsusT0tiML pic.twitter.com/ft7g5c3nre
— Sky News (@SkyNews) January 9, 2015