Lighting a candle in memory of murdered investigative journalist Jan Kuciak, in Slovakia. Photograph: Reuters/ Radovan Stoklasa

Slovak journalist Jan Kuciak was investigating possible links between political figures in his country and the Italian mafia before he and his girlfri(...)

Police stand guard at the scene where Slovak investigative journalist Jan Kuciak and his girlfriend Martina Kusnirova were murdered, in Velka Maca. Photograph: Vladimir Simicekv/AFP/Getty Images

Slovakia has offered a €1 million reward to help solve the murder of journalist Jan Kuciak and his girlfriend, which police believe was probably linke(...)