IRANIAN Foreign Minister Mohammad Javad Zarif will attend talks on the Syrian civil war beginning in Vienna tomorrow after the US agreed to invite its declared enemy.

The major diplomatic breakthrough came after Washington said that it was ready to engage with Tehran if it would help resolve the protracted conflict.

US State Department spokesman John Kirby said that US officials had “always recognised that at some point in the discussion, moving toward a political transition, we have to have a conversation and a dialogue with Iran.”