French police say two men said to be responsible for the killing of 12 people at a satirical magazine in Paris have been sighted in a town in northern France.<br />The Paris-based agency said on Thursday that the police have confirmed the two men were in the Aisne district in northern France.<br /><br />Tensions in Paris were high on Thursday as France began a day of national mourning, after the controversial Charlie Hebdo magazine was attacked by three armed men on Wednesday. Twelve people were killed and 11 others were injured in the attack.<br /><br />Al Jazeera's Barnaby Phillips reports from Paris.
