Chennai, Nov. 13 -- A police investigation was launched on Wednesday after bomb threat emails were sent to Tamil Nadu's director general of police's (DGP) office, claiming to target the residence of three DMK ministers in Chennai and Trichy district, people familiar with the matter said, adding that they were later found to be hoax.

The bomb scare email was sent to the police warning of threats in state minister of Hindu religious and charitable endowments Sekar Babu's Chennai residence and the homes of minister of education Anbil Mahesh and minister of municipal administration KN Nehru in Trichy districts. Police teams along with bomb disposal and detection squads and sniffer dogs conducted searches and found them to be a hoax.

Accordi...