Speaking to the British broadcaster from Islamabad, he said the investigations into the attacks were ongoing and he would "not jump to a conclusion" on who was responsible until they were complete. New Delhi has fingered "elements" in Pakistan for the attacks that left 172 people dead, and British Prime Minister Gordon Brown said militants from Pakistan-based group Laskhar-e-Taiba were responsible. "What we are saying is that we are willing to cooperate -- and you know like anybody else does, that investigation is an evolving process, it hasn't been long enough" to come to any conclusions, Zardari said. He added: "I think we will hold our judgement till the proper investigation and conclusive evidence is shared between Pakistan and India, and we're hoping that that would happen because we've asked for a joint investigation." Put to him that the sole surviving gunman has been identified as a Pakistan national, the president said: "No, we don't know that, we haven't investigated that, we are investigating that position. "There have been disputed positions in the press... I would say the investigation is ongoing and I would not jump to a conclusion." However, he said his country was prepared to act if links to Pakistan emerged. "If that stage comes, and when it comes, I assure you that our parliament, our democracy, shall take the action properly deemed in our constitution and in our law," he said.