Ahead of Independence Day and amid increase in ceasefire violations by Pakistan, state authorities have sounded high alert along the Indo-Pak border as well as in the hinterlands of Jammu and Kashmir. An alert has also been sounded in hinterlands of Rajouri, Poonch and Doda districts after inputs of some militant activity, police officials said. Patrolling along the border line with Pakistan has also been increased and round the clock vigilance is being maintained, apart from use of equipments, including thermal imagers.Security has also increased along the International Border (IB) in Jammu, Kathua and Samba sectors, where a tunnel from Pakistan was discovered on July 28. Security has been beefed up at the Jammu and Srinagar airports also following some reports, IGP Jammu, told reporters in Srinagar. There have been five ceasefire violations by Pakistan targeted at the Indian posts along the LoC and IB in the state in which three BSF jawans were injured during past one week.