A man allegedly strangled his wife inside a car in front of their children on the Lucknow-Purvanchal Expressway in Uttar Pradesh's Sultanpur in the early hours of Sunday, police said.

The accused, Rahul Mishra, was taken into police custody, they said.During interrogation, the accused told the police that he suspected his wife Monika Gupta (32) of having an affair and hence, he killed her, a police official said.Station House Officer (SHO) of Kurebhar Police Station Praveen Yadav said the accused had left Lucknow for Rae Bareli with his family in a car.

But instead of going to Rae Bareli, he went towards the Purvanchal Expressway. He killed his wife near Seur village in Sultanpur, the police officer said.He said had a police patrol team not reached the spot on time, the accused might have also killed his daughter Anshika (12) and son Atharva (6).The woman's body was sent for post-mortem. An FIR was lodged and an investigation was underway, the SHO said.