The UN chief has called for a renewed diplomatic push after attacks on civilian infrastructure in Iran and across the region, as US-Iran strikes and counterstrikes have intensified and commercial maritime traffic through the Strait of Hormuz remains at a standstill.

“He is particularly concerned about attacks on civilian infrastructure in Iran and across the region,” UN Deputy Spokesperson Farhan Haq said. “Such attacks are unacceptable.” The statement followed reports that ongoing US attacks had hit bridges and other primarily civilian infrastructure inside Iran, while strikes also damaged targets elsewhere in the region.

Interim agreement under strain

A month ago, Tehran and Washington signed a Memorandum of Understanding after the launch of an intense bombing campaign by the US and Israel in late February. The interim deal under the MoU included a ceasefire and the opening of the Strait of Hormuz, a waterway that normally carries one fifth of the world’s oil and gas supplies.

Iran launched counterstrikes that it said were targeting US bases and infrastructure in neighbouring Gulf States. The attacks destabilised the region and brought commercial maritime traffic through the strait to a standstill. Kuwaiti authorities reported on Friday that Iranian strikes had hit a power and desalination plant, causing damage to the facility, which is currently being assessed.

Iran’s interpretation of the MoU was that Tehran remained ultimately in control of the strait and could demand tolls for safe passage. The US and the international community rejected that view, insisting on freedom of navigation without fees. Following further Iranian attacks on shipping, the strait was shuttered again.

The UN chief reiterated his firm conviction that “there is no military solution to this conflict and calls for stepped up diplomatic efforts towards a peaceful and durable settlement”, Mr, Dujarric said. He added that any settlement should include the full restoration of international navigational rights and freedoms in and around the Strait of Hormuz.