ISLAMABAD - The Chief of Army Staff General Ashfaq Pervez Kayani chaired the two-day Corps Commanders Conference that started at the General Headquarters on Thursday. Informed sources said that all the Corp Commanders and Principal Staff Officers participated in the conference. Sources said that a number of issues were discussed during the first day of the conference including war games and welfare of Army Jawans and others. Director General Military Operations gave a detailed briefing on the security situation in Swat and FATA. The conference, sources said, also took stock of the situation arising out of the belligerent statements of the US military commanders that coalition forces in Afghanistan could carry out direct actions inside Pakistan. The commanders took serious view of the situation on Pak-Afghan border and resolved that no external forces would be allowed to conduct operations inside Pakistan, thus vowing to defend the sovereignty and integrity of the country at all costs. The two-day Corps Commanders Conference will conclude on Friday (today).   Monitoring Desk adds: Pakistan would retaliate if US-led foreign forces violated Pakistan's territorial sovereignty again, a private TV channel quoted an Army spokesman as saying in an interview with BBC. Pakistan had told the Nato forces in Afghanistan that any further violation of its frontiers would not be tolerated, said spokesman Maj-Gen Athar Abbas, adding that the country reserved right to defend its sovereignty. To a question, he said that Pakistan's reaction would be as per the US interference, and decision to strike back would be taken at proper time. "Only Pak Army has the right to operate inside Pakistan's borders," he said, adding that Pak Army had taken action against militants in the tribal areas. He kept on saying that it was quite evident from the record that Pakistan had killed and arrested a number of Taliban and Al-Qaeda activists and handed them over to the US. He said that Pakistan would carryout out operation against terrorists if it got substantiated intelligence in this regard.