Charlie Hebdo attack: Huge police operation in Longpont

The two main suspects in the Islamist attack on Charlie Hebdo magazine in Paris are said to have robbed a service station in the north of France.

The Picardy region has been put on high alert and armed police and helicopters have been seen in and around the village of Longpont, where a witness said officers had been making house-to-house inquiries.

Christian Fraser has more details.