Despite FBI backed proof of Pakistan's involvement in the Mumbai Attacks in India that started on November 26th, Indian government has indicated that there has been little support from the Pakistan's government. Leading newspaper in India, Hindu mentioned - 

Pakistan’s contention that it does not have an extradition treaty with India to hand over possible suspects in the Mumbai terror attacks does not hold water, say diplomatic observers, as it is a signatory to international conventions that demand that states either prosecute terror suspects or extradite them to the country that wants to try them.

Pakistan's leading newspaper Dawn mentioned -

 India expressed its disappointment with Pakistan on Friday over what it said was Islamabad’s failure to crack down on militants blamed for the Mumbai attacks that New Delhi says came from across the border.

Foreign Minister Pranab Mukherjee, who has been leading the chorus of Indian accusations, also said on Friday that “Pakistan should not allow militant groups to fool the world, as they often sought to do, by changing their names”.
Mr Mukherjee was commenting on reports from Pakistan about Jamaatud Dawa (JuD) assuming a different name after having been banned by the UN.
He said Pakistan was party to the Saarc Convention on International Terrorism and several other international conventions. It was, therefore, Pakistan’s responsibility to act against terror outfits and the duty of the international community to persuade it to comply with these conventions and commitments and check terrorism flowing from its soil.
Reports from Pakistan today said the JuD had decided to acquire a new name – ‘Tehreek-e-Hurmat-e-Rasool’ – to continue its activities under a new identity. Mr Mukherjee said it was the responsibility of the Pakistan government to take action against such organisations even though they change their name or form.
‘’When LeT was banned, it came up as JuD. Now it has been banned. It (JuD) might have taken another name. This is the pattern we have noticed in Pakistan. It is the responsibility of the Pakistan government to stop the activities of these banned organisations in any form, any name, any shape,’’ the minister said.
Mr Antony said more than two dozen “terror” groups were operating from Pakistan with impunity.
“When more than 30 terrorist outfits are still operating in Pakistan, how can I say there is a real improvement or real change in attitude?” he added. Pakistan says it has launched raids on militants on its soil after the Mumbai attacks and detained several of their leaders wanted by India. But India said it was not satisfied and Pakistan needed to do more to dismantle the infrastructure of terrorism.

Pakistan has recently been in a lot of pressure from US to arrest the people involved in the planning and execution of the attacks. The government banned the group that is supposed to have been involved and arrested some key members of the group. But as Indian officials mentioned that the arrests were made to make news and possibly all arrested will be released after some time with no big consequence.

 All of this has made conditions worse for India and Pakistan with a possibility of war.