 On February 3 , 1969 , Eduardo Mondlane was killed by explosives smuggled into his <unk> . Many sources state that , in an attempt to rectify the situation in Mozambique , the Portuguese secret police assassinated Mondlane by sending a parcel to his office in Dar es Salaam . Inside the parcel was a book containing an explosive device , which detonated upon opening . Other sources state that Eduardo was killed when an explosive device detonated underneath his chair at the FRELIMO headquarters , and that the faction responsible was never identified . 
