Zora Singh, 39, committed suicide by hanging himself from the ceiling fan of his house after poisoning his two daughters (7 and 5 years old), a 3-year-old son and strangulating his wife Mandeep to death yesterday in Machiwara area of the district, 45 km from here, they said.
The neighbours informed the police following which the bodies were recovered from the house today and have been sent for post mortem, they said.
Police is further investigating the matter.