` This is a red alert . Russian forces have ` ` complete operational control '' of Crimea , a U.S. official says . U.S. Secretary of State John Kerry will travel to Crimea immediately . Ukrainian government says Russian actions are ` ` a declaration of war '' Ukrainian leaders condemn Russia 's ` ` clear violation '' of Ukraine 's sovereignty .
Russian forces have ` ` complete operational control '' of Crimea , a U.S. official says . U.S. Secretary of State John Kerry will travel to Crimea immediately . Ukrainian government says Russian actions are ` ` a declaration of war '' Ukrainian leaders condemn Russia 's ` ` clear violation '' of Ukraine 's sovereignty .