"We have not said that we will not provide evidence. These are early phases of investigation...once the investigation is complete we will share the evidence with Pakistani authorities," he said.
Chidambaram said that he had conveyed India's position to his Pakistani counterpart Rehman Malik.
"We had no indication (earlier) as to who may have been behind the attack. Now we have some evidence. A couple of people are suspects," he told NDTV here.
He said that right-wing Hindu group Abhinav Bharat member Swami Aseemanand has confessed his involvement in the Samjhauta case as also in the Malegoan blast case before a court.
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