Pakistan on Thursday promised US Secretary of State Condoleezza Rice that it would take "strong action" against anyone on its territory found to have been involved in the Mumbai attacks. President Asif Ali Zardari told the top US diplomat, on a lightning visit to Islamabad, he was determined that Pakistan would not be used to orchestrate attacks or shelter terrorists such as those who committed last week's outrage. With tensions rising between the two countries since India said that all the attackers in the brazen assault, which left 188 people dead, had come from Pakistan, Zardari reiterated a pledge to help probe the Mumbai atrocities. "The government will not only assist in investigation but also take strong action against any Pakistani elements found involved in the attack," said Zardari in an official statement issued after he met with Rice.