The US Chairman Joint Chiefs of Staff Committee Admiral Mike Mullen has arrived in Islamabad on Saturday amid US concerns over the presence of militants blamed for attacks on NATO-led troops in Afghanistan.

Mullen will meet President Asif Ali Zardari, Prime Minister Yousuf Raza Gilani and Chief of Army Staff General Ashfaq Pervez Kayani.

Both sides will discuss several issues including war on terror, attacks on NATO-led troops in Pakistan and the implementation on the agendas discussed in Kabul Conference.