Lucknow, April 10 -- Three labourers were killed and two others injured after a gravel-laden truck overturned onto a temporary tin shelter near an under-construction bridge in Uttar Pradesh's Saharanpur district in the early hours of Friday, police said.

Saharanpur's Deoband Circle Officer (CO) Abhitesh Singh said that the accident took place around 3 am in the Nagal police station area on the Saharanpur-Jhabreda route, where bridge construction work is currently underway.

Singh said that five labourers - Asgar, Istkar, Shaukeen, Gulfam, and Karmveer - all residents of Mahmoodpur village, were working at the bridge construction site and had put up a temporary tin shelter by the roadside for the night.

The truck carrying gravel was head...