The incident occurred when the bus was on its way to Delhi from Baraut this morning, police said.
The deceased have been identified as Nagini (65), Tasnim (30), Sattar (40), Harun (36), Sajid (26), Farzana (28) and Faizali (7), all residents of Purbaliyan village in the district. They were on their way to Muzaffarnagar.
Senior officials have rushed to the spot, police added.