The United Arab Emirates has strongly condemned Iran. They called the attack on two oil tankers "brazen".
The incident happened on Monday in the Strait of Hormuz. This is a very important waterway for oil transport.
One person was killed in the attack. Eight other people were injured.
The United States has also taken new action against Iran, according to reports.
Details about the exact nature of the attack and the involvement of the involved parties are being investigated.