a j . s . nuclear - propulsion sub collided with a norwegian fuel - tanker in the straits of hormuz the - night . only severe impacts to the tanker and no serious injuries were reported . the uss newport news submarine collided with the bow of the japanese ocean - tanker , causing minor damages to the freighter . no personnel on either vessel were seriously injured , us navy and japanese state personnel said . the channel of hormuz connect the persian gulf to the arabian sea and is a major waterway for oil tankers .
Two submarines have collided.