A Frenchman accused of shooting four people dead at a Jewish museum in Brussels went on trial on Thursday, allegedly the first Syria jihad veteran to stage a terror attack in Europe.
Mehdi Nemmouche, 33, who was in court, faces a life sentence if convicted of the cold-blooded killings in the Belgian capital on May 24, 2014, following his return from Syria's battlefields.
Both Nemmouche and Nacer Bendrer, a fellow Frenchman aged 30 who allegedly supplied the weapons, appeared calm as the trial began in a Brussels criminal court under heavy security.
Accompanied by two police officers in balaclavas, Nemmouche sat down in the dock wearing an orange sweater.
At the presiding judge's request, he gave his name: "Nemmouche, Mehdi."
Bendrer, who could also be jailed for life if convicted, sat a short distance away from him dressed in a black sweater, accompanied by a female police officer whose face was visible.
Both listened with little expression as prosecutors began reading the 200-page charge sheet.
They have previously denied charges of "terrorist murder" for the anti-Semitic 82-second shooting spree.
More than 100 witnesses were due to testify at the trial which is being attended by the victims' families and Jewish community leaders.
Firing a pistol and then an assault rifle, the gunman killed two Israeli tourists, a French volunteer and a Belgian receptionist at the Jewish Museum.
Six days after the attack Nemmouche -- born to a family of Algerian origin in the northern French town of Roubaix -- was arrested in the southern French port city of Marseille, where he arrived on a bus from Brussels.
Investigators say he was carrying a handgun and an assault rifle used in the shooting.
They say he fought with a jihadist faction in Syria from 2013 to 2014, where he met Najim Laachraoui, a member of the gang which went on to carry out suicide bombings in Brussels that killed 32 people in March 2016.
- Nemmouche 'relaxed, calm' -
The same Brussels cell is also alleged to have coordinated and sent jihadists to carry out the Paris gun attacks and bombings on November 13, 2015, in which 130 people were killed and hundreds more wounded.
Both attacks were claimed by the Islamic State (IS) group, whose activities in Syria and Iraq lured thousands of jihadists from Europe.
Nemmouche and Bendrer, investigators say, met nearly a decade ago while in prison in southern France, where they were both described as "radicalised" inmates who tried to win others over.
Bendrer was arrested in Marseille seven months after the Jewish Museum attack and charged as Nemmouche's accomplice.
Although he was jailed for five years in September by a French court for attempted extortion, he was transferred to Belgium for the trial.
Nemmouche is expected to face a separate trial in France for holding French journalists hostage in Syria.
The former hostages are expected to testify about Nemmouche's character during the Brussels trial, despite the defence arguing that theirs is a separate case.
"When I hear his lawyers say he is someone who can be very polite, very urbane, sure. He is a clever one," former hostage Didier Francois told Europe 1 radio.
"But, as for me, I will never forget his capacity for violence," the journalist said. "He was among the people who tortured the Syrians, Iraqis, the prisoners."
Nemmouche lawyer Henri Laquay told journalists on Thursday that his client was "relaxed, calm," adding: "He will choose the moment when to speak."
More than 300 Belgian and foreign journalists have registered to cover the museum attack trial which could last until the end of February or early March.
Mehdi Nemmouche faces a life sentence if convicted
Map showing the location of the Jewish Museum of Belgium in Brussels on May 24, 2014 and the arrest of Mehdi Nemmouche 6 days later.