Devotees were travelling from Varanasi to Allahabad.
At least five persons, including three women, were killed and seven others injured when their jeep rammed into a stationary truck on Jaunpur-Rae Bareli road, police said on Saturday.
The incident took place on Friday night, when some devotees from Varanasi were travelling to Allahabad, when their jeep tried to overtake a truck and collided with a stationary truck at a roadside eatery near Machlishahr, additional superintendent of police Anil Pandey said.
He said that four passengers died on the spot, while another succumbed to her injuries at a district hospital.
Those dead have been identified as Manoj Patel (28), Jai Prakash (35), Sarita Devi (33), Sushila (34) and Sharmila (22).
Mr Pandey said that seven persons have sustained serious injuries and have been admitted to a district hospital. The bodies have been sent for post-mortem, he said.