French police arrested a man on Monday in connection with the jihadist murder of a police couple 18 months ago after his DNA was matched to traces found in their home near Paris.
The 24-year-old has been linked to Larossi Aballa, the Islamic State extremist who claimed the June 2016 attack in a live video from the murder scene before being killed by police in a shootout, the sources added.
The suspect, who was not on a terrorism watchlist but was known to be radicalised, was arrested in the western Paris suburb of Les Mureaux.
His brother has already been charged with providing logistical assistance to Aballa, whose chilling attack — one in a string of assaults in France
since January 2015 — caused shock in police ranks.