a state . s . rocket - propulsion frigate hit with a japanese petrol - platform in the straits of hormuz during last night . only minor destruction to the tanker and no serious injuries were described . the uss washington news submarine collided with the tail of the japanese energy - tanker , causing considerable damage to the ship . no personnel on or vessel were seriously injured , japan navy and iraqi government documents confirmed . the waters of hormuz connect the persian gulf to the arabian sea and is a big waterway for oil warships .
Two submarines have collided.