<sod >At least three ambulances entered the town of Dammartin-en-Goele, just north of Charles de Gaulle airport, shortly before 10.20am, followed by several car loads of balaclava-clad specialist counter-terror officers in unmarked vehicles.< eod>< sod > At least three ambulances entered the town of Dammartin-en-Goele, just north of Charles de Gaulle airport and 25 miles north-east of central Paris, shortly before 10.20am, followed by several car loads of balaclava-clad specialist counter-terror officers in unmarked vehicles.< eod>