The Odisha government said state honour would be accorded to Naba Kishore Das, the health and family welfare minister who died in hospital hours after being shot by a policeman.
A government release said on Sunday evening there will be no official entertainment for three days from January 29-31 throughout the state.
"It has been decided by the Government of Odisha that as a mark of respect, state honour would be accorded to the departed dignitary. The national flag will be flown at half-mast on the day of death in the state capital and on the day of funeral at the place where it takes place," the release said.
The minister, 60, was shot at Brajrajnagar town around 1 pm by Assistant Sub-inspector of Police (ASI) Gopal Das, who is believed to be suffering from mental disorder.
A team of doctors at Apollo Hospital operated on the minister after he was airlifted from Jharsugada to Bhubaneshwar, but he eventually succumbed to injuries.