The tractor trolley overturned on the roadside last night after it was hit by a dumper truck, killing Anil Kumar (35) on the spot and injuring 25 people, out of which three were in critical condition, they said.
As he was fleeing from the spot, the dumper truck driver mowed down an autorickshaw, killing its driver Raju (36), they said.
The dumper truck driver was arrested and his truck was seized, police said.
The injured were admitted to hospital, they said, adding, the matter is being probed.