Biden said the United States had "accomplished" its limited original mission of crushing the international militants groups behind the 9/11 attacks and that with every passing year the rationale for staying was "increasingly unclear."
The twin suicide blasts in Baghdad killed at least 32 people and wounded more than 100.
"Pakistan condemns terrorism in all its forms and manifestations and stands in solidarity with the brotherly government and people of Iraq in their fight against terrorism," FO said.