Sri Lankan forces have killed 420 Tamil Tigers in the last three days and pushed the rebels back into a «no-fire» zone set up to protect civilians trapped in the fighting, the military said Sunday. Government troops captured the entire Puthukkudiyiruppu area, the last rebel stronghold on the edge of the safety zone in the last pocket of land in the island's war-ravaged north, military spokesman Brig. Udaya Nanayakkara was quoted as saying by Associated Press. He said the Tamil Tigers are now confined to the «no-fire» zone in a narrow strip of land along a beach in northeastern Sri Lanka.