The Slovak police have taken necessary precautions after investigative journalist of Aktuality.sk Peter Sabo found a bullet in his letter box, announced Police Corps president Milan Lucansky on the police's Facebook profile on Friday. Sabo, who was hired by Aktuality.sk after its investigative reporter Jan Kuciak was murdered along with his fiancée Martina Kusnirova in early 2018, found the bullet in his letterbox on Thursday.