 In late 1966 , Guevara 's location was still not public knowledge , although representatives of Mozambique 's independence movement , the FRELIMO , reported that they met with Guevara in late 1966 in Dar es Salaam regarding his offer to aid in their revolutionary project , an offer which they ultimately rejected . In a speech at the 1967 International Workers ' Day rally in Havana , the acting minister of the armed forces , Major Juan Almeida , announced that Guevara was " serving the revolution somewhere in Latin America " . 
