Ten other injured persons are still undergoing treatment, Inspector General (Law and order) A Satish Ganesh said in Lucknow today.
A tractor-trolley was hit by a Kotdwar-bound passenger train at an unmanned crossing in Najibabad yesterday killing four persons on the spot, police said.
The persons who died today are yet to be identified, they said.
Four persons who died yesterday were identified as Omawati (40), Lal Singh (40), Romesh (35) and Ram Kunwar (60), they said.