The announcement came as the U.S. released new evidence to support its allegation that Iran was responsible for the attack on Saudi Arabia's oil sites.
Iran announced it has begun using advanced centrifuges to enrich uranium.
The incident, involving two foreign ships, comes a day after Iran seized another tanker and the U.S. claimed to have downed an Iranian drone.
The U.S. says it was a limpet mine attached to the ship in the Gulf of Oman. The Japanese vessel's owner says something flew toward the ship.
The Secretary of State said the attacks are part of a “campaign” of “escalating tension” by Iran.
One of them was reportedly en route to pick up Saudi oil to take to the United States.
U.S. Navy Seals have seized a Libyan tanker that was under the command of Libyan Rebels.
Unchecked exploitation of the British Columbia's priceless coastline has mortgaged our future while accruing a massive ecological debt.
The Kodiak, an Exxon tanker, lost power as it was leaving Prince William Sound. The reason it didn't end like the Exxon Valdez disaster 20 years ago is strong citizens' oversight.
KUALA LUMPUR, Aug. 19 (Xinhua) -- An oil tanker was caught fire offshore Malaysia in the Malacca Straits, nine people were