The U.S. Embassy in Kenya has warned of an "imminent threat" of a terror attack in the touristy port city of Mombasa, urging Americans to leave and suspending all U.S. government travel to the city until July 1. Officials did not provide any further details about the threat, though the embassy has issued other warnings since Kenyan troops invaded Somalia in October to fight the Islamic militant group Al-Shabab, which is tied to al Qaeda. Mombasa is one of several cities in Kenya that has been hit with grenade attacks since the invasion.
