Police shot dead three heavily armed terrorists when they tried to enter the Rashtriya Swayamsevak Sangh headquarters in Nagpur in the wee hours on Thursday.
Three Ak-56 rifles, a huge quantity of RDX and 12 hand grenades were recovered from the slain terrorists, who were dressed in uniforms of police sub-inspectors and had used a white Ambassador car with a red beacon to carry out the attack.
Giving details of the encounter, City Police Commissioner S P S Yadav said the police chased them after they broke through the first barrier, about 200 metres from the headquarters.
Yadav said that when the police challenged them, the terrorists opened fire from their AK-56 rifles and were subsequently killed in retaliatory fire.
Yadav said two policemen were also injured in the encounter that lasted about five minutes.
The identities of the three terrorists, who were in the age group of 20-22 and believed to be members of the Lashkar-e-Tayiba, are yet to be established, the police said.
Former RSS spokesperson Ram Madhav said, "We are happy that the police took firm action," he said.
Last month, the Anti-Terrorist Squad had recovered 30 kg of RDX, 17 AK-47 rifles and 50 hand grenades from a Jeep in Aurangabad and arrested 11 suspected LeT militants.
The arms and ammunitions were being transported in computer boxes. This was the biggest seizure of RDX after the 1993 serial bomb blast in Mumbai.