The United States is responsible for the pause in talks between Tehran and world powers in Vienna aimed at reviving their 2015 nuclear deal Iranian foreign ministry spokesperson Saeed Khatibzadeh said on Monday.
"America is responsible for the halt of these talks ... a deal is very much within reach," Khatibzadeh told a weekly news conference.
"Washington should make political decision for the deal's revival," he said, adding that Tehran would "not wait forever".
Iran has said that there are still outstanding issues, including Washington removing a foreign terrorist organisation (FTO) designation against Iran's Islamic Revolutionary Guard Corps (IRGC).
Also Tehran has been pushing for guarantees that any future U.S. president would not withdraw from the agreement. The extent to which sanctions would be rolled back is another unresolved issue.
