Iran and the UN nuclear watchdog have reached an agreement on a timetable to respond to lingering questions over Teheran's controversial nuclear activities, both sides said Tuesday. The agreement was announced at the end of two days of talks in Teheran between senior officials from the International Atomic Energy Agency and Iranian nuclear negotiators. "We have now in front of us an agreed working plan. We agreed on modalities on how to enforce it. We have a timeline for the implementation," IAEA chief of delegation Olli Heinonen told reporters. Senior nuclear negotiator Javad Vaeedi also said the two sides agreed on a framework to resolve the outstanding issues over Teheran's nuclear activities.