An Army jawan martyored and two militants gunned down in an encounter between security forces and militants in Jammu and Kashmir. The encounter started early Friday morning in Malganipora area of Sopore in Baramulla district. Terror outfit Jaish-e-Mohammed has claimed responsibility for the attack on a camp of the 42 Rashtriya Rifles. This is the second such incident in four days in which militants have used sniper rifle to carry out attack on security establishments.