Police and paramilitary personnel have been deployed in large numbers across the city to ensure that there are no attempts to violate prohibitory orders, police said.
Police vehicles fitted with public address systems made appeals to residents not to venture out of their homes in view of the curfew.
Barbed wires have been laid at all exit points in the interiors of the city and civil lines area.
Curfew was imposed on Wednesday night after a 22-year-old youth was killed when CRPF personnel allegedly opened fire after coming under attack by a group of stone pelters in Zoonimar area.
The CRPF personnel were heading towards SKIMS Hospital to donate blood for their colleagues injured in the terror attack.
Two militants and five CRPF jawans were killed in the suicide attack on their camp.