US Secretary of State Marco Rubio addressed NATO foreign ministers in Helsingborg, Sweden, on May 22, 2026, calling for greater allied assistance to reopen the Strait of Hormuz and advance peace talks with Iran. Rubio reported incremental progress in negotiations but stated that key issues including Iran's highly enriched uranium stockpiles remain unresolved. Pakistan's army chief separately arrived in Tehran for mediation efforts between Iran and the United States.