Superintendent of Police (SP) Abhinandan said that the incident took place around 1 am when labourers were returning to their houses from Varanasi on tractor.
"On Prayagraj Highway, the tractor collided with the truck coming from Aurai," he said.
He said 10 people travelling on the tractor were killed on the spot.
"Those killed have been identified as Bhanu (25), Vikas (30), Anil (35), Suraj Kumar (22), Sanohar (25), Rakesh Kumar (25), Nitin (22), Roshan Kumar (25), Prem Kumar (40), and Rahul Kumar (26)," he said.
The SP said three injured, including Jamuni (26), Akash (18), and Ajay, have been referred to Varanasi for treatment in a serious condition.
Agitated by the incident, the local residents blocked the road. The SP along with heavy police force reached the spot and pacified the mob.