The mishap took place near a bridge at Poicha village when a dumper truck crashed into a stationary tractor.
R A Parel, Police Sub-Inspector, said the deceased and the injured were travelling in a tractor and were on way to their native Paldi village in Kaira district after attending a social function.
The tractor carrying them stopped near a bridge at Poicha village when a speeding dumper came from behind and collided with it. Four persons were killed on the spot and five others injured, Patel said.