A tanker came under attack while passing through the Strait of Hormuz, according to the UK's maritime security agency UKMTO. The crew is safe, but the agency gave no details on the vessel's nationality, its ports of origin and destination, or whether it was carrying oil or liquefied natural gas. Those gaps leave open questions about who was behind the attack. The strait between Iran and Oman handles a large share of the world's oil and gas shipments.