(Rpting, correcting typos)

On Board Prime Minister's Special Aircraft, Aug 1 (UNI) Indian intelligence agencies have some credible leads on the recent bomb explosions in Bangalore and Ahmedabad and are working on them.

''We have certain intercepts which give us some leads about the involvement of some terrorist organisations and we are working on them,'' a senior official told reporters accompanying Prime Minister Manmohan Singh who arrived in Colombo to attend 15th SAARC Summit.

These blasts could not have been carried out without local support, the official said.

Asked about the so-called Indian Mujahideen that claimed responsibility for involvement in the blast, the official said, ''We have not heard about this group.'' The Prime Minister, who will meet his Pakistani counterpart Yousaf Raza Gillani tomorrow, is also likely to take up the matter with him.

''The recent Ahmedabad and Bangalore blasts reflected the capacity and hi-tech capabilites of the attackers. Obviously there is some organisation behind it,'' the official said without identifying any group.

The Bangalore blast showed greater level of sophistication and greater degree of computer specialisation, the official added.

Asked about the recent ceasefire violation by Pakistan, the official said such incidents should not be overemphasised.

UNI RB/SMA AE DS1351