In the US, investigators say two planes crashed more than 600 miles apart in Alaska almost simultaneously, killing four people. The National Transportation Safety Board said two died and a third person was injured when their Piper PA-30 went down nine miles southwest of Haines. Authorities said witnesses reported seeing the twin-engine plane crash shortly after takeoff.<br/><br/>Meanwhile, another report said two people died when a single-engine Arctic Aircraft S-1B2 crashed east of Fairbanks. Alaska State Troopers reported late yesterday that both the pilot and passenger died in the crash. <br/><br/>