What reasons lie behind Iran's refusal to negotiate with the USA through Pakistan's mediation?

The Iranian Embassy in Pakistan rejected on Tuesday the United States' offer for negotiations, calling it a 'deception' and refusing any dialogue with Washington. This position complicates Pakistan's efforts to facilitate negotiations to end the war in the Middle East. Iran stated that the American offer is an attempt to reposition itself and escalate attacks, emphasizing that trust is 'null' after the attacks during previous discussions.

Pakistan, along with Turkey and Egypt, has confirmed that it also assumes the role of mediator, with Prime Minister Shehbaz Sharif expressing his desire to host meaningful negotiations. The war in the Middle East continues, with coordinated attacks by the US and Israel on Iran, and Iran has responded with missile and drone attacks, maintaining the Strait of Hormuz blocked, a crucial point for global oil supply.