New Delhi, Sep 7 (IANS): External Affairs Minister S.M. Krishna Friday left for Pakistan on a three-day visit that will see India's concerns on threats of terror emanating from various quarters in Pakistan topping the agenda of talks.

India has made it clear that terrorism, and particularly the 26/11 attack, would remain a "core issue" as both sides review the second round of the dialogue process, revived in February 2011 after a long hiatus following the Nov 26-28, 2008, terror strike.

While the foreign secretaries - India's Ranjan Mathai and Pakistan's Jalil Abbas Jilani - will meet Friday, Krishna will hold talks with his Pakistani counterpart Hina Rabbani Khar Saturday.

Both ministers will also co-chair the plenary of the India-Pakistan Joint Commission Saturday.

Krishna, who was last in Pakistan in July 2011, spends some time in Lahore Sunday on the way back.

Other issues likely to figure in the talks are confidence building measures (CBMs), release of prisoners as well as trade and border issues.