Injuries have been reported after a US Navy destroyer collided with a merchant ship off the coast of Japan.

A study has found that YouTube is emerging as a major platform for news, and one to which viewers increasingly turn for eyewitness videos in times of major events and natural disasters.

The Japanese Coast Guard today defended the weekend shooting of a possible North Korean spy ship, saying that the clash - which left the two dead and 13 missing - unfolded in self-defence.