Rejecting India's demand to extradite the perpetrators of the Mumbai terror attacks [Images] to the country, Pakistan has said such a move will be 'harmful' for it as there was no extradition treaty between the two neighbours.

'There is no extradition treaty between India and Pakistan. We are keen on rebuilding our internal institutions. So if we engage in these issues, it will be harmful for Pakistan,' Foreign Minister Shah Mehmood Qureshi told Geo TV.

Asked whether India and America have made demands for handing over terror suspects -- Lashkar-e-Tayiba [Images] operations commander Zakiur Rehman Lakhvi, Jaish-e-Mohammed chief Masood Azar and Hafiz Mohammed Saeed, Qureshi said Pakistan had conducted its own 'independent investigations' into the charges of Pakistani elements involved in the Mumbai terror strikes and that it will do everything in the interests of India and Pakistan.

Asked about the Wall Street Journal report, which quoted Pakistani government sources saying that a LeT commander had confessed that all terrorists who attacked Mumbai were Pakistanis, Qureshi said: 'I think I don't believe that government sources are involved here.'

Stating that terrorism was a common enemy, the Minister said Pakistan and India should defeat it together.

'Terrorism is our common enemy. We have to defeat it together. Pakistan is always ready for constructive cooperation,' Qureshi said.