Four Punjab farmers returning from protest sites near Delhi borders died in two separate road accidents on Tuesday.

In the first incident, two farmers from Patiala were killed after their tractor-trolley was hit by a truck in Haryana's Karnal district, police said. In the accident, which took place on Taraori flyover in Karnal, a third farmer was seriously wounded while some others sitting on the trolley escaped with minor injuries. Taraori police station's SHO Sachin said the two deceased were aged around 24 years and 50 years respectively. He said one of the farmers travelling in the tractor trolley told police that the truck driver apparently fell asleep behind the wheels which led to the accident.