DUBAI, United Arab Emirates (AP) — A U.S. Army Apache attack helicopter crashed near the Strait of Hormuz, with President Donald Trump saying the two pilots abroad are “fine” after the incident involving the waterway that remains under a chokehold by Iran.

What caused the crash remained unclear Tuesday morning in the Middle East, which was still reeling after Iran and Israel exchanged fire the previous day in the biggest strain yet to the nominal ceasefire in the Iran war. Iranian state media, relying on foreign reporting, acknowledged the crash, without elaborating.