The incident comes close on the heels of the killing of a Muslim teen on board a Mathura-bound train.
Upender Prasad (45), a resident of Faridabad in Haryana, boarded the train from Chandigarh railway station. He had to get down at Delhi station and then travel to his hometown on the outskirts of the national capital.
"Prasad in a complaint said he boarded the Chandigarh-Kerala Sampark Kranti Express's coach for the disabled. Three physically fit men, aged between 20 and 24, were also travelling in the same coach," a senior government railway police official told PTI.
"As the train started moving, the men started smoking and Prasad opposed it. Enraged over it, they hurled abuses and kicked and punched him.
"They snatched Prasad's purse, mobile phone and even tried to strangulate him. When the train neared Model Town, about 25 km from Chandigarh, they threw him out," Station House Officer, GRP, Ambala Cantt, Raj Bachchan said, quoting the complaint.
He suffered fracture in his left leg and a shoulder, and a head injury. Two passersby rushed him to Ambala civil hospital, the SHO said.
The three attackers have been booked on charges of attempt to murder, theft and other relevant provisions of law.
Railway officials in Chandigarh have been asked to scan CCTV footages for clues.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)