Tonga tsunami sparks 'unprecedented disaster

Tonga says it has been hit by an "unprecedented disaster", in the government's first update since a volcanic eruption triggered a tsunami. 

In a statement, the government confirmed three deaths: two locals and a British national. 

It said some of the smaller, outlying islands were particularly badly affected, with all the houses destroyed on one and just two left on another. 

Aid efforts have been hampered by ash falling from the volcano.