BREAKING : Earthquake rattles Anchorage, Alaska

People ran out of office buildings in Anchorage, Alaska this morning as a 6.6 magnitude earthquake struck the city.
   

And officials have issued a tsunami warning for coastal areas of southern Alaska including parts of the Cook Inlet and the southern Kenai peninsula.
   

The warning means tsunami waves are expected.
   

The U-S Geological Survey says the earthquake was centered about 12-kilometres north of Anchorage.