The accident took place late last night, when Suresh Chandra (40), Hansraj (35) and Jai Jairam (30) were returning after attending a marriage programme, they said.
Suresh and Hansraj died on the spot, while Jairam sustained serious injuries and was hospitalised at the district hospital, Station Officer Kothi police station R P Rawat said.
Efforts are on to identify the vehicle which hit the motorcycle, the officer added.