Tehran, July 4 (IANS): Negotiators of Iran, European Union (EU) and the US on Saturday ended a marathon debate on wording the context of a deal on Tehran's nuclear programme, a media report said.

Senior Iranian negotiators Abbas Araqchi and Majid Takht-e Ravanchi, EU Deputy Foreign Policy chief Helga Schmid as well as US Under Secretary of State for Political Affairs Wendy Sherman took part in the talks in the Austrian capital Vienna on Saturday morning, IRNA reported.

However, the report said that negotiations between Atomic Energy Organisation of Iran (AEOI) chief Ali Akbar Salehi and US Energy Secretary Ernest Moniz were going on.

A meeting of Iran’s Foreign Minister Mohammad Javad Zarif and US Secretary of State John Kerry is also expected later in the day. Zarif is also expected to meet chief of the International Atomic Energy Agency Yukiya Amano.

Representatives from Iran and the P5 1 group of world powers -- the US, Britain, France, Russia, China, plus Germany -- are currently working together in Vienna to finalise the context of a possible deal by July 7.