Jeya (42) and her daughters aged 21, 17 and nine were found hanging this morning in their house in Alwarthirunagar, they said.
Neighbours who grew suspicious as the house remained closed till late this morning alerted the police, who broke open the main door and found the woman and her three daughters dead.
They took the extreme step after they came to know that their family head Tamilselvan was allegedly linked to the theft case, police said.
Tamilselvan was picked up based on interrogation of Sugirtharaja and his wife Revathy, who told them that she had given the stolen jewels to Tamilselvan, police said.
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