AICC General Secretary Narayanasamy told PTI from Karaikal over phone that he had received an "unsigned letter" at his residence here on May 5, threatening to attack him and Gandhi.
The letter written in Tamil stated, "Your party is responsible for closure of industries in Puducherry. We will attack you and your former Prime Minister's son and blast (you two) while attending a meeting."
Narayanasamy said he had filed a complaint with police and also informed the party high command.