Islamabad, May 27 (IANS) US Secretary of State Hillary Clinton Friday discussed here security related issues and US-Pakistan ties with President Asif Ali Zardari, a media report said.

 
 The Clinton-Zardari meeting, held at the President House, lasted for half an hour. It was followed by delegation level talks, an official told the Associated Press of Pakistan.
 
 The Pakistani delegation comprised Prime Minister Yousuf Raza Gilani, Army chief General Ashfaq Pervez Kayani, Minister of State for Foreign Affairs Hina Rabbani Khar and Foreign Secretary Salman Bashir.
 
 Chairman of the US Joint Chiefs of Staff Admiral Mike Mullen and US ambassador in Pakistan Cameron Munter represented Washington.
 
 Clinton arrived here Friday morning on a day-long visit.
 
 The talks are taking place in the backdrop of the May 2 killing of Osama bin Laden by US commandos that have strained ties between Washington and Islamabad.
 
 Both the Pakistan Taliban and Al Qaeda have vowed to avenge Osama's killing.