Turkey to offer mediation in US-Iran showdown
Friday's visit by Iranian Foreign Minister Abbas Araghchi comes after US President Donald Trump threatened a military strike on Iran over its deadly protest crackdown this month and the lack of a nuclear agreement.
A US naval strike group is in the Middle East and Trump has warned it was "ready, willing and able" to hit Iran "if necessary".
Turkish Foreign Minister Hakan Fidan will tell Araghchi that his country "is ready to contribute to resolving the current tensions through dialogue", a Turkish diplomatic source said.