Aksha (6), Farhaan (8), Sarika (3) and Farhan (8) lost their lives after they entered a car parked outside their house and fully loaded with crackers, exploded today in Farrukh Nagar town under Sahibabad police station area, ASP Vipin Tada said.
The fifth child Krish (7) sustained severe burn injuries and has been admitted to a private hospital, he said.
Aksha and Farhaan were the children of Rizwan; Sarika, the daughter of Furkhan; Farhan, son of Sazid and Krish belonged to Praveen, police said.
A forensic team has been summoned to the site to ascertain the real cause of the incident, police said.
The bodies have been sent for post mortem, Yadav said, adding that no case has been registered in the incident so far.
"We will file an FIR once a complaint is filled," Yadav said.