New Delhi, Feb 12, : Union Home Minister P. Chidambaram on Thursday welcomed Pakistan's admission that some part of the conspiracy on Mumbai attacks has taken place on its soil and said the dossier was tightly argued document that no one can ignore it.

Addressing the media, Chidambaram said, "My initial response is that it is a positive development. The dossier handed over on January 5 was an exceptionally and tightly argued document, a cogently argued document that no one can ignore it."

He said that the Union External Minister Pranab Mukherjee would make a statement tomorrow on Pakistan's response.

Earlier, Ministry of External Affairs has also welcomed the Pakistan's decision and said that Pakistan's response is a positive response and India will share whatever it can with the neighbouring country.

"It remains India's goal to bring the perpetrators of the terrorist attacks on Mumbai to book, and to follow this process through to the end. We would also expect that the Pakistan take credible steps to dismantle the infrastructure of terrorism in Pakistan," the foreign ministry statement said.

Yielding under international pressure, Pakistan on Thursday admitted for the first time that some part of the Mumbai attacks conspiracy has taken place on its soil.

The disclosure made by Rehman Malik, the Pakistan Prime Minister's Adviser on Interior Affairs, is `well timed' because it has come at a time when President Barack Obama's Special Envoy on Pakistan and Afghanistan, Richard C. Holbrooke, is due to visit New Delhi.

Rehman's portrayal of both Pakistan and India being joint victims of terror, the analysis says has a twin objective -- (1) To show Islamabad's sincerity and desire to bring the perpetrators of the attack on Mumbai to justice, and in doing so, look good and cooperative, and (2) To convince other countries, including India, that the attack has the smackings of an international conspiracy involving "non-state actors".

The questions posed by Malik during his press conference on Thursday, the analysis says, "will naturally take time to answer", but it also suggests that the posers have been "designed to prolong the issue further".

A reference to an Indian being involved in the bomb blast of the Samjhauta Express near Panipat, the analysis says is likely to queer the political and security pitch in the Indian subcontinent.

Will Pakistan allow a trial of its citizens in India? Will Islamabad seek Ajmal Amir Kasab's extradition for trial as per Pakistani laws? These are questions that still remain to be answered.

There is a view that the probe in the Mumbai attack case may just have the similar fate as the Daniel Pearl Case - `Nothing will happen'.

Pakistan, according to the analysis, "has bought time and India will be told to cooperate." (ANI)