Iran attempted to launch a cruise missile from a submarine in the Strait of Hormuz on Tuesday but the test failed, two U.S. officials told Fox News. An Iranian Yono-class “midget” submarine conducted the missile launch. North Korea and Iran are the only two countries in the world that operate this type of submarine.

In February, Iran claimed to have successfully tested a submarine-launched missile. It was not immediately clear if Tuesday’s test was the first time Iran had attempted to launch a missile underwater from a submarine. This incident comes on the heels of other recent provocations from Iran.  In April, the U.S. Navy’s guided-missile destoryer fired a warning flare after an Iranian Revolutionary Guard vessel came within 1,000 meters of the USS Mahan. READ MORE