Two persons died on the spot, while the rest of them died of their injuries at a hospital.
Six people lost their lives on Sunday evening when a dumper truck collided with a car on the Lucknow-Kanpur highway in the Achalganj police station area in Unnao, officials said.
Following the collision, the car got dragged for some distance and hit a woman and her daughter before falling into a ditch, Superintendent of Police Siddharth Shankar Meena said, adding the incident occurred around 7 pm.
Two persons died on the spot, while the rest of them died of their injuries at a hospital.
The victims have been identified as Chhottelal (32), Shivang (30), Vimlesh (60), Rampyari (45) and her daughter Shivani (13), Emergency Medical Officer at the district hospital Dr Ashish said, adding the identity of the sixth victim is yet to be ascertained.
Locals had blocked the road following the accident. However, the blockade was lifted after sometime following intervention by the police.
Meanwhile, Uttar Pradesh Chief Minister Yogi Adityanath has expressed grief over the loss of lives in the Unnao road accident, the Chief Minister's Office said in a tweet.