The foreign ministers of Germany, France and Britain plan to hold nuclear talks with their Iranian counterpart on Friday in Geneva, a German diplomatic source told Reuters.

The ministers will first meet with the European Union’s top diplomat, Kaja Kallas, at Germany’s permanent mission in Geneva before holding a joint meeting with the Iranian foreign minister, the source said.

The aim of the talks, which the source said are taking place in coordination with the United States, is to persuade the Iranian side to firmly guarantee that it will use its nuclear programme solely for civilian purposes.

According to the source, the talks are to be followed by a structured dialogue at expert level.