An earthquake has shaken buildings in Anchorage, Alaska, and authorities issued a tsunami warning there. The U.S. Geological Survey said the quake was centered about 7 miles north of the city, which is the largest in Alaska.
A witness in Anchorage saw cracks were visible in at least one two-story building,the Associated Press reports.
The earthquake registered at a 6.7 magnitude.
This is a developing story.