Superintendent of Police Saurabh Kumar said the criminals opened fire on Rashid Ahmad Sircar when he was sleeping on the roof of his house yesterday night.
Sircar (25) died on way to hospital.
Locals became violent and set two police vehicles on fire, the SP said.
Additional police force was deployed to bring the situation under control, the SP said.
The SP also said that it appeared that the killing was a result of some old enmity.