Pentagon chief Leon Panetta paid an unannounced visit to Afghanistan on Wednesday, a private local television channel Tolo reported. During his stay in Afghanistan, the Defense Secretary will hold talks with President Hamid Karzai and top commanders of the NATO-led forces stationed in the country, said the report. However, no official was available to make comment. Washington, reportedly would decide to keep some of its troops in Afghanistan after 2014 when the NATO-led International Security Assistance Force (ISAF) leaves the conflict-ridden nation.