DUBAI, United Arab Emirates (AP) — Iran’s Supreme Leader Ayatollah Ali Khamenei said on Thursday his country had delivered a “slap to America’s face” with its strike on a U.S. airbase in Qatar, and warned against any further attacks in his first public comments since a ceasefire was declared with Israel after 12 days of war.

Arab governments emphasized this week that that the root issue underlying the violence — the decades-old Israeli-Palestinian conflict — must be resolved.

The president announced a truce and Israel later said its airports were returning to full activity and it was lifting restrictions on civilian movements.