Mozambican journalist Paulo Machava, the editor of daily electronic newssheet "Diario de Noticias", was shot dead in the capital by unidentified assailants on Saturday, a media report said.
According to witnesses, the assassination took place when Machava was out on his habitual morning exercise, Prensa Latina news agency reported.
Two shots from an AK-47 assault rifle hit him in the head and two in the back. The killers sped away in a vehicle.
Machava was organising a demonstration against the trial of economist Nuno Castel-Branco and journalists Fernando Veloso and Fernando Banze.
Castel-Branco was accused of a felony against the state security and Veloso and Banza were charged of abusing press freedom.