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DUBAI: The prime minister of Qatar visited Tehran on Thursday in a bid to revive diplomatic channels, as the US and Iran traded recriminations over Washington’s latest sanctions drive, described by one Iranian official as “all-out economic war”.

Qatar has served as a back-channel negotiator for the warring parties and played a direct role in securing a June ceasefire that briefly led to a cessation of hostilities.

Qatari PM Sheikh Mohammed bin Abdulrahman Al Thani, who is also his country’s foreign minister, held talks in Tehran with Iranian Foreign Minister Abbas Araghchi, according to Iran’s foreign ministry.

The two discussed a proposed phased framework that includes establishing a temporary joint Iranian-Omani shipping corridor through the strait and carrying out a joint project to clear mines from the waterway, Qatar’s foreign ministry said.