Senior Congress leaders met Home Minister Rajnath Singh on Monday seeking more security for party vice president Rahul Gandhi and others after their Puducherry unit received a threat letter.
The letter, written in Tamil, had threatened to kill Rahul like his father and former Prime Minister Rajiv Gandhi. The Congress delegation including Anand Sharma and Ahmed Patel urged Singh to order an investigation into the letter.
Rahul is scheduled to address an election rally on Tuesday in Puducherry which goes to polls on May 16.
"Home minister has assured prompt action and security enhancement. He also assured that the agencies of centre and state, Special Protection Group (SPG) will be alerted to the threat that has been received," Sharma told reporters later.
Rajiv Gandhi's was assissinated by an LTTE suicide bomber on May 21, 1991 at Sriperumbudur where he was addressing an election rally.