The Islamic State group has issued a statement claiming responsibility for the deadly attack on Tunisia's national museum that killed 23 people, mostly tourists. Thursday's statement described the attack as a "blessed invasion of one of the dens of infidels and vice in Muslim Tunisia," and appeared on a forum that carries messages from the group. The US-based SITE Intelligence Group also announced that IS had claimed Wednesday's attack. http://english.ahram.org.eg/News/125655.aspx