Another round of talks between Iran and world powers is expected to be held soon, Iran's ambassador to Germany said.

Alireza Sheikh Atta said the discussions will occur after Iran's Supreme National Security Council secretary Saeed Jalili submits a letter to EU foreign policy chief Catherine Ashton, the semi-official Mehr news agency reported on Saturday.

Attar said negotiations have been held to prepare another round of talks between Iran and the so-called 5+1 group, which includes Germany and the five permanent members of the U.N. Security Council - the United States, Britain, France, Russia and China.

"In addition to our recent letters to the European Union, we will soon send another letter and then a meeting will be arranged," Atta said, according to Mehr.