The daughter of former Mozambique president Armando Guebuza, Valentina, was shot dead on Wednesday in the capital Maputo.
According to Diario de Noticias newspaper, her husband, Zofina Mujuane, a businessman who once worked with British American Tobacco has been arrested by the police. Ms Guebuza was listed as the seventh most powerful young woman in Africa by Forbes magazine in 2013 and held a strong of positions in telecommunications companies and family businesses.
The couple married in 2014 at a ceremony with 1,700 guests including South Africa leader Jacob Zuma, the King of Swaziland Mswati III and Isabel dos Santos, the daughter of the Angolan president. They welcomed a daughter last year.