Charlie Hebdo attack: 'Two guys entered with Kalashnikov guns'

Gunmen have attacked the Paris office of French satirical magazine Charlie Hebdo, killing 12 people and injuring 7, French officials say.

David Chour in Paris spoke of hearing about sustained gunfire at the office as the attackers opened fire with assault rifles before escaping.

A major police operation has been launched in the Paris area to catch the attackers.