PARIS, June 1 (Xinhua) -- Paris prosecutor Francois Molins on Sunday believed the French suspect arrested over the weekend was behind the deadly shooting at Brussels Jewish museum following "strong body of evidence."
Arrested on Friday in Marseille, south France, the 29-year-old man was carrying in his luggage a Kalashnikov automatic rifle and a gun with ammunition and clothes similar to those used in the shooting last weekend, Molins told reporters.
Police also found an insignia from the "Islamic State in Iraq and the Levant (ISIL)", an Islamist cell group active in Syria and in Iraq and a video camera.
Paris prosecutor added, Mehdi Nemmouche was a "recidivist offender" who has been radicalized during his last jail sentence in 2007.
"During his last stay in jail he was noticed for extremist proselytism, On Dec. 31, 2012, three weeks after he was freed, he traveled to Syria," Molins said.
"He spent over a year in Syria, where he seems to have joined combatant groups, jihadist terrorist groups," the prosecutor added.
Nemmouche from Roubaix, north France, was in custody over allegations of murder, attempted murder, possession of weapons and carrying a terrorist activity, according to Paris prosecutor.
Four people including a French national had been killed at a dare daytime shooting which targeted a Jewish museum in Brussels center last weekend.