The Haryana government declared a three-day state mourning from Friday as a mark of respect to former chief minister Om Prakash Chautala who passed away in Gurugram.

"The state government has decided to observe a three-day state mourning... that is December 20-22 . During this period, the national flag will fly at half-mast throughout the state on all buildings where it is flown regularly," an order issued by Haryana chief secretary's office said.