The burnt bodies of Warangal Congress MP Sircilla Rajaiah's daughter-in-law and his three grandchildren were found at his residence on Wednesday.
According to reports, a gas cylinder leak led to the fire that caused the tragedy but the police are still investigating the confirm the source of the fire.
Rajaiah's daughter-in-law had allegedly tried to commit suicide in March last year and had filed a case of dowry against the minister's family.
Rajaiah had lost the 2014 Lok Sabha elections from Warangal. He was scheduled to file his nomination for Lok Sabha bypolls, at Warangal seat on Wednesday.
