More gunfire and a blast have been heard at an Indian air force base at Pathankot, near the Pakistani border. <br />It follows an earlier attack on the base on Saturday. At least four attackers and seven Indian soldiers have died so far. <br />Indian officials had previously said that the base had been secured. <br />The BBC's Nitin Srivastava is at the checkpoint in Pathankot which leads to the base.
