Iran has asked to meet British, French and German negotiators in Brussels on Monday to discuss the standoff over Teheran's nuclear program, EU and British officials said.
Germany, France, Britain and the US have called for Iran's referral to the UN Security Council, a move that could lead to sanctions. China and Russia remain unconvinced.
EU and British officials - speaking on condition of anonymity due to the sensitive nature of the discussions - confirmed that senior officials from Britain, France and Germany would hold talks with Iran's deputy nuclear negotiator, Javad Vaeidi, at Iran's request on Monday.
The meeting will come as US Secretary of State Condoleezza Rice joins foreign ministers from the four other permanent Security Council members - Britain, France, Russia and China - plus Germany - in London on Monday in an attempt to break the diplomatic deadlock over Iran's nuclear program.
The 35-nation board of the International Atomic Energy Agency meets on Thursday at the UN agency's headquarters in Vienna, Austria, to discuss the Security Council referral.