U.S. State Department spokesperson Matthew Miller said Washington remained "concerned about anything that would be escalatory or cause an increase in conflict in the region" but did not expect the strike to affect talks on freeing Israeli hostages held by Hamas. Iran's Foreign Minister Hossein Amirabdollahian said on Tuesday a Swiss diplomat representing U.S. interests in the country was summoned by Tehran to emphasize the responsibility of Washington in the attack. "An important message was sent to the American government as a supporter of the Zionist regime (Israel).