mangaluru a man and his sister allegedly committed suicide by dousing themselves with petrol and setting themselves ablaze in sangabettu village bantwal taluk according to police the siblings may have taken the extreme step as both of them were battling health issuesthe victims are nilayya shettigar42 and his sister kesari 39 police said that the siblings were unmarried and living with their relatives at midnight on monday when everyone was asleep the duo set themselves ablaze after pouring petrol on themselves and died on the spot police were informed about it around 130ampolice added that the victims father and mother had died in december and february respectively after their deaths nilayya was depressed a relative told the police nilayyas brother was reportedly sleeping in another room in the house and rushed to help them when he heard them screaming in pain a case of unnatural death has been registered at the bantwal rural police station