The other members injured in the firing were identified as Mubarik, Furkan, Ishak, Gufran, Irshad, Shakir, Arif, Muntazer and Mehtab Shamshad.
They were attacked for apparently voting for a particular candidate in the recently held assembly polls in the district, police said.
The victims were rushed to a nearby health centre where Nadeem succumbed to his injuries, police said, adding the body was sent for postmortem.
Muzaffarnagar and neighbouring districts including Shamli in western Uttar Pradesh had witnessed communal riots in September last year that left over 60 people dead and thousands of people displaced. The 10 western UP districts had gone to polls on April 10.