Chen Kegui, who allegedly hacked at officials with knives after they charged into his house, is now in detention, accused of attempted murder in relation to the clash.
The convicted soldier, a highly experienced sergeant, was the first member of the British armed forces to be charged with murder in relation to the conflict in Afghanistan.
The public prosecutor's office has opened an inquiry into attempted murder in relation to the incident in Paris on Wednesday.
Five men pleaded not guilty last Saturday to charges of rape and murder in relation to the December incident.
The Post and Courier newspaper said the young man had also been indicted with three counts of attempted murder in relation to three people who had survived the June 17 incident.
Stephen John Port, 40, of Cooke Street, Barking, was charged with four counts of murder in relation to the deaths of four men between June last year and September this year, Scotland Yard said.
In a statement, Sergeant Lonny Haschel said Eddie Ray Routh, 25, of Lancaster, had been charged with two counts of murder in relation to the double shooting.
ACC Shewan said Mr Cregan had been arrested on suspicion of two counts of murder in relation to the investigations into the deaths of David Short and Mark Short.
Police have charged Laval university student Alexandre Bissonnette with six counts of first-degree murder in relation to the Quebec City mosque shooting.
At a remand hearing at the high court in Belfast yesterday, Gordon Kerr QC, for the prosecution, told the judge: "We can confirm that police received directions on April 19 that murder charges in relation to those killed in the Omagh bombing would be considered by a magistrate at a preliminary inquiry".
