"It (killing of policemen) is a desperate act, attacking unarmed policemen...It is basically a desperate act to show their presence," Kumar said after praying tributes to slain personnel here.
He said the militants have become desperate after security forces registered success by eliminating their leadership and newly infiltrated groups.
"Of late, you have been seeing that security forces are getting success in neutralising (militant) leadership. Newly infiltrated groups have also been wiped off," the police chief said.
"We will investigate and come back with facts," Kumar said.
Two policemen were shot dead by militants at Zadibal while another was killed in Tengpora area of the city this morning.