The deceased have been identified as Rinku (32) and Bhupendra (31). A 28-year-old police constable, Kapil, was also seriously injured in the accident, they said.
The incident took place last evening when the three men were on their way to Bulandshahr, police Station House Officer Shikarpur, Shatrughan Singh said.
Kapil has been referred to Meerut for treatment, he added.
The tractor driver has been arrested and a case was registered against him, Singh said.