Five Indian powerlifters, including world champion Saksham Yadav, succumbed to his injuries after meeting a vehicle accident near New Delhi on Sunday morning.
The accident took place at around 4 am, near Alipur village of Delhi, close to the Singhu border between Delhi and Haryana.
Bodies of four powerlifting players killed in the national capital were brought to their residence.
Yadav, a resident of Nagloi in north Delhi, won gold for India in powerlifting world championship held in Moscow previous year.
The victims were travelling on the Delhi-Panipat National Highway-1 in a Swift Dezire vehicle. The cause of the accident is said to be dense fog that continues to blanket Delhi-NCR amid the intensifying cold wave conditions.
The injured were admitted to the Max hospital in Shalimar Bagh in New Delhi. Yadav was later shifted to the trauma centre of the All India Institute of Medical Sciences, where his condition was said to be "extremely critical". The athlete had sustained grievous head injuries and severe internal bleeding.
DCP (Rohini) Rajneesh Gupta said the deceased have been identified as Tikamchand alias Tinka (27), Saurabh (18), Yogesh (24) and Harish Roy (20).
They were travelling from Panipat towards Delhi.
The private auto carrying the six athletes crashed with a road divider, after its driver lost control over the steering, on the road and turned turtle near Alipur village around 4:00am. Due to the impact of the crash, the car's roof was blown away.