Deepak, Sunil and Shah Rukh Khan, all aged around 20 years, were talking on the road side when the trailer coming from Kishangarh hit them at Jatli-Tiraha, about 5 km from Gegal, SHO of Gegal Police Station Om Prakash said.
The deceased were a resident of nearby Gagwara village, he said.
One of them died on the spot, while two others died on their way to a hospital, he said.