"My heartfelt condolences to the families & colleagues of Col Rai & the 2 jawans of the Army as also of Constable Singh of J&K Police martyred in the line of duty in Tral today," Omar wrote on micro-blogging site Twitter.Com.
"A grim reminder of the costly sacrifices militancy in J&K continues to demand of our men," he added.
Two security personnel, including an Army officer, who was awarded a gallantry medal on the occasion of Republic Day, were today killed in a fierce gunbattle which also left two Hizbul Mujahideen militants dead in Pulwama district of Jammu and Kashmir, an Army spokesman said.