Four members of a farmer's family allegedly committed suicide at their home in nearby Tirupur district, reportedly due to financial burden, police said.
The neighbours, who noticed the house closed for a long time on Sunday morning at Dharapuram village, peeped in and found Muthuswamy, his mother and two children hanging from the ceiling, police said.
The farmer's wife had gone to a nearby village to attend a festival, they said.
Police said the farmer first hung his 11-year-old daughter and his four-year-old son before he and his mother ended their lives in a similar manner.
Muthusamy, who had taken four acres of land on contract, was upset as he could not get expected returns from farming.
A preliminary inquiry revealed that financial burden was the reason for the extreme step, police said.