US President Donald Trump claims that direct negotiations with Iran are under way, and has warned that the latest round is Tehran’s “last chance” to secure a deal to end the war.

Esmaeil Baghaei, Iran's foreign ministry spokesperson, denied that any direct negotiations with Washington were ongoing, nor any plans for meetings, as the talks over the management of the Strait of Hormuz remain mediated by Oman.

According to sources who spoke to Anadolu, Pakistani and Qatari negotiators are working to secure a meeting date and venue.

On Monday, Pakistan issued an urgent invitation to Iranian negotiators to Islamabad, in what appears to be a bid to renew stalled Iran-US talks.

During a phone call, Pakistan’s Deputy Foreign Minister Mohammed Ishaq Dar invited Iran's Foreign Minister Abbas Araghchi to Islamabad “at his earliest convenience".