Jaipal, Akhtar and Mohammad Suja were killed when the truck in which they were travelling overturned in Jamkhera village in Bagpat, they said.
Two persons were injured and hospitalised, police said adding the truck was on way to Delhi when the accident took place.
One Deepak was killed when his bike was hit by a roadways bus in Tehra village in Aligarh district, police said.