The Middle East’s ability to solve its problems has been held back by America’s 50-year insistence that the Gulf states should view Iran as a security threat, Oman’s foreign minister said on Monday in a significant speech designed to break the deadlock over the region’s future.

Badr Albusaidi called for a non-aggression security pact involving all six Gulf states as well as Iran and Iraq. The US would in future no longer be the primary provider of security, he said.

He was speaking on the day high-level defence and intelligence officials from Turkey, Pakistan and Saudi Arabia travelled to Tehran in an attempt to prevent a renewed outbreak of fighting between the US and Iran.

From left, Saudi Arabia’s defence minister, Khalid bin Salman, Pakistan’s army chief, Asim Munir, and Ibrahim Kalin, the head of Turkey’s intelligence service, at a meeting in Tehran on Monday. Photograph: Iranian Presidency Office/AP

Tehran said the meeting also explored future security arrangements in the region.…