Kyodo / Reuters

People take shelter as a ceiling collapses in a bookstore during an earthquake in Sendai, northeastern Japan March 11, 2011.

Toru Hanai / Reuters

Japan's Prime Minister Naoto Kan reacts as he feels an earthquake while attending a committee meeting in the upper house of parliament in Tokyo March 11, 2011.

AP: An earthquake measuring 8.9 struck off the northeast coast of Japan on Friday, shaking buildings in the capital Tokyo, causing at least one fire and triggering a 20-foot tsunami warning, NHK television and witnesses reported. Get the latest from here and see images from the aftermath here.