India's Foreign Secretary is due to visit Pakistan this month to discuss Kashmir, a Pakistani official said on Tuesday, the first formal talks between the two rivals on their core dispute since the Mumbai attacks in 2008 froze their peace process. India broke off peace negotiations with Pakistan after the Mumbai attack that killed 166 people, but the two sides agreed earlier this year to resume talks. Indian Foreign Secretary Nirupama Rao and her Pakistani counterpart Salman Bashir were assigned to tackle the territorial argument over Kashmir, which lies at the heart of tension between the two nuclear-armed states. "She (Nirupama Rao) is expected here later this month to discuss peace and security, Jammu and Kashmir as well friendly exchanges," the Pakistani foreign ministry official told Reuters.