The man, identified as Nagabhushanam, also suffered 80 per cent burns and later died during treatment at Government General Hospital in Guntur.
According to preliminary investigations by the police, Pradeep had a love marriage with Manikranti five years ago. However, there were frequent quarrels between the couple.
The deceased include two children, aged 3 and 6, and their father, who worked as a security guard in a nearby poultry farm.
The Andhra Pradesh police are on high alert as fear continues to grip the state following fake messages on social media.