A 47-year old woman was detained on Thursday for allegedly threatening that she will function as a human bomb when the chief minister and deputy chief minister visit the city, police said.
The Police Control Room in Chennai received a call that they traced to Chettipalayam here, police said.
The woman was identified as Shakuntala, who was a senior functionary in the AIADMK for seven years from 1990.
She was detained and further interrogation is on, police said.