Iran says, it can resume talks from September 1 with world powers over its atomic programme if its conditions were met.<br/><br/>Iran's top nuclear negotiator Saeed Jalili, in a letter to European Union foreign policy chief Catherine Ashton said that Tehran needs three questions answered by world powers before it can consider resuming talks.<br/><br/>On June 28, President Mahmoud Ahmadinejad declared a two month freeze on talks with world powers over Iran's controversial nuclear programme, saying it is a penalty after the UN levied fresh sanctions on Tehran.