The kids, aged between six and 11 years, were waiting at a bus stop with their father Prem Kumar to catch school bus when the roadways bus driver lost control over the vehicle while negotiating a turn and hit them, they said.
Two of them, including a girl, were killed on the spot while their father and brother injured, they said, adding the injured were rushed to PGIMS hospital in Rohtak.
A case has been registered against the driver, who fled from the spot after the incident, they said.