The joint statement was signed after Manmohan Singh met Pakistani Prime Minister Yousuf Raza Gilani in Sharm-el-Sheikh last week.
'Prime Minister Gilani mentioned that Pakistan has some information on threat in Balochistan and other areas,' the document states.
It was the first time that Balochistan has been referred to in any joint declaration by the two countries.
BJP spokesperson Ravi Shankar Prasad had said on Thursday that the inclusion of Balochistan would enable Pakistan to hold India responsible for problems in the province.
'By one stroke you have given some kind of culpable legitimacy to the government of Pakistan to allege in the international forum that India foments problems in Balochistan,' Prasad said.
Prasad also said the joint statement would have a long term impact on India's prestige in the international community.