Prasad said the joint statement, signed by Prime Minister Manmohan Singh and his Pakistani counterpart Yousuf Raza Gilani in Sharm-el-Sheikh, will have a long term impact on India's prestige in the international community.

'We feel very sorry. It will have long term implications on our reputation and prestige in the world,' Prasad told reporters.

Earlier, faced with criticism for including Balochistan in the declaration, Foreign Secretary Shiv Shankar Menon had said that India had nothing to hide on the issue and was ready to talk.