Asked by reporters if anyone has claimed responsibility for the blasts, he said, "I would not like to say anything at this stage. There are some clues... We are trying these together."
To a question whether terrorist violence has gone up in the country as has been witnessed in Spain, Indonesia and some other countries, the prime minister said, "I would not like to speculate."
Soon after the prime minister's return from Agartala, Home Minister Shivraj Patil, National Security Adviser M K Narayanan, Cabinet Secretary B K Chaturvedi and Home Secretary V K Duggal met him and briefed him on the situation. Earlier, Patil chaired a meeting of the Crisis Management Group to assess the situation arising out of the blasts.