AlQa'dah 20, 1433, Oct 6, 2012, SPA - Police have opened an arson investigation after a violent fire destroyed a house in western Sweden, leaving three people missing, AP reported. One more person was hospitalized with minor injuries after inhaling smoke in the blaze that started late Friday at a house on the small island of Orust, just off Sweden's western coast. Police spokesman Peter Adlersson said Saturday it is still unclear what caused the fire but police suspect it could have been started deliberately.