Pentagon officials say the US is monitoring the seizure by Iran of a Marshall Islands-flagged cargo ship.

The MV Maersk Tigris was moving through Iranian waters in the Straits of Hormuz, according to the Pentagon.

Iranian patrol vessels fired warning shots across the bow of the boat, US officials said, branding the action "inappropriate".
http://www.bbc.com/news/world-middle-east-32503660