The two brothers-- Ranvir and Gautam -- had a heated argument when Ranvir opposed supplying of liquor by Gautam at Bhikki village yesterday, police said.
In a fit of rage, Gautam allegedly stabbed to death Ranvir.
Guatam has been arrested, they said.
Meanwhile, in another incident, a youth was beaten up when he opposed three youths who were eveteasing in Titawi area.
The incident took place in a bus which was on its way to Muzaffarnagar from neighbouring Shamli yesterday, police said.