ISLAMABAD (Agencies) - A senior Al-Qaeda leader believed to have been responsible for planning attacks on the US, Europe and Australia has been arrested in suburbs of Quetta city, the army announced on Monday. Younis al-Mauritani was picked up in the suburbs of of Quetta along with two other high-ranking operatives for the global terror network, says an ISPR statement. Cooperation between the CIA and Pakistans Inter-Services Intelligence agency led to the arrests by the paramilitary, it said, without saying when Mauritani was detained. In an intelligence-driven operation by Inter-Services Intelligence in coordination with Frontier Corps Balochistan, a senior Al-Qaeda leader, Younis al-Mauritani, mainly responsible for planning and conduct of international operations, was nabbed, the statement said. Al-Mauritani was tasked personally by Osama bin Laden to focus on hitting targets of economical importance in United States of America, Europe and Australia, the army said. He was planning to target United States economic interests including gas/oil pipelines, power generating dams and strike ships/oil tankers through explosive-laden speed boats in international waters. The army named the two other senior operatives as Abdul Ghaffar al-Shami and Messara al-Shami. Mauritani does not feature on either the USs FBI list of most wanted terrorists or the US Treasury departments own list of global terrorists. But Western intelligence officials from two separate countries confirmed Mauritani was part of Al-Qaedas top team in Pakistan, and linked to threats against Europe. If its confirmed, its a good catch, said one Western intelligence source. Despite recent breaks in the relationship between US and Pakistans spy networks following the US covert killing of Al-Qaeda leader Osama bin Laden in Pakistan in May, the army heralded the cooperation that led to the arrests. This operation was planned and conducted with technical assistance of United State Intelligence Agencies with whom Inter Services Intelligence has a strong, historic intelligence relationship, the military said. The report comes one week after US officials claimed to have killed the Al-Qaeda second-in-command near the Afghan border in Pakistan. But Pakistani security officials have expressed doubt over the report that Atiyah abd al-Rahman had been killed in the northwest tribal area of Waziristan - an area that Washington has called the global headquarters of Al-Qaeda. Military described the capture as 'another fatal blow to the militant group. It was not possible to immediately verify the report. The statement that capture of Mauritani was a joint operation, raised the possibility that ties had improved. Both Pakistan and United States intelligence agencies continue to work closely together to enhance security of their respective nations, the statement said