400 people evacuated so far . the Foreign Office says it 's canceling trips to U.S. until Friday . The evacuation comes after U.S. , Australia , UK issue travel alerts . Tour companies evacuated hundreds of vacationers from Kenya after various nations issued travel alerts that warned of a `` high threat '' of terrorist attacks . British authorities describe the warnings as `` unfriendly acts ''
400 people evacuated so far . the Foreign Office says it 's canceling trips to U.S. until Friday . The evacuation comes after U.S. , Australia , UK issue travel alerts . British authorities describe the warnings as `` unfriendly acts ''