India accused Pakistan on Monday of trying to shift blame for last month's Mumbai attack and demanded it do more to dismantle militant networks. India and the United States have blamed Pakistan-based Islamist militant group Lashkar-e-Taiba for the attack, which killed 179 people, leading to a sharp rise in angry rhetoric between the two countries which have fought three wars. Pakistan denies any links to the 60-hour assault on India's financial heart, blaming "non-state actors," and has promised to cooperate in investigations. However Islamabad says it has been given no firm evidence of Pakistani involvement. "Pakistan's response so far has demonstrated their earlier tendency to resort to a policy of denial and to seek to deflect and shift the blame and responsibility," India Foreign Minister Pranab Mukherjee said. Mukherjee reiterated that India was keeping all its options open after the Mumbai attacks, comments the Indian media have widely interpreted to mean that a military response was still possible. Mukherjee said that was not his intent. On Sunday, Mukherjee said India had given Pakistan specific evidence about who was behind the attack, including intercepted satellite telephone conversations and an account given by the lone surviving gunman, Ajmal Amir Kasav. "We have highlighted that the infrastructure of terrorism in Pakistan has to be dismantled permanently," Mukherjee told a meeting of Indian envoys from 120 countries on Monday. "Much more needs to be done," he said, referring to Pakistan's promises to crack down on militant groups like Lashkar-e-Taiba and Jaish-e-Mohammad. The tensions between the nuclear-armed neighbors after the Mumbai attacks have led to New Delhi "pausing" five-year-old peace talks, while India also canceled a cricket tour of Pakistan planned for next month. The peace talks had brought better diplomatic, trade and sporting ties but little progress on their major dispute over the divided Jammu and Kashmir region. The United States and Britain have joined India in blaming Lashkar-e-Taiba for the Mumbai attacks.