Pakistan confirmed the arrest of two men named by India as planners of the militant attack on Mumbai, but a senior Indian official described Pakistani actions so far as "eyewash." Two operations commanders with the Lashkar-e-Taiba jihadi group, Zaki-ur-Rehman Lakhvi and Zarrar Shah were being held, Prime Minister Yousaf Raza Gilani told journalists in Multan city. "They have been detained for investigation," he said, providing the first official confirmation since Lakhvi's arrest in a raid on a Lashkar camp in Pakistani Kashmir on Sunday. India has put the official death toll in the Mumbai attack at 179, and public anger with Pakistan is running high. The US has engaged in intensive diplomacy to stop tensions mounting between nuclear-armed India and Pakistan and keep Islamabad focused on fighting the Taliban and al Qaeda threat on its border with Afghanistan. While other media have reported up to 40 people had been arrested, Pakistani intelligence officials told told that only around a dozen people have been detained, mostly in the raid on a camp outside Muzaffarabad. Military spokesman Major-General Athar Abbas said an operation against banned militant organizations remained underway, and was being carried out in several places. The prime minister said he had no up-to-date information on whether Maulana Masood Azhar, the leader of the Jaish-e-Mohammad militant group, was also detained, as some media have reported. "This is an eyewash. We want action that meets our concern," a senior Indian government official, who asked to remain anonymous, said. "There is no modicum of doubt about the complicity of elements of Pakistan, including the ISI," the official said. America's top military officer, Adm. Mike Mullen, called the arrests a positive step but urged Pakistan to do more to address the militant threat from its soil. "We measure by deeds," Mullen, chairman of the U.S. Joint Chiefs of Staff, told reporters at the Pentagon. "It remains very important that the government of Pakistan take not just the steps they've taken but the steps that they need to continue to take to root this out so it doesn't happen again."