Khalid El Bakraoui

Brussels’ metro station attacker Khalid El Bakraoui had reached Greece from Italy in July 2015, according to Sky Italia TV network citing Italian counter-terrorism unit sources.

Specifically, on July 23, 2015, he flew to Italian city Treviso from Brussels and the next morning he flew from Marco Polo Airport in Venice to Athens.

The mystery over one of the assailants of the March 22 Brussels attack remains, as the Netherlands said that they were not properly informed of the bomber's terror links, while Turkey and the United States claim that they had previously notified relevant authorities. 

Belgian authorities arrested a suspect believed to have taken part in the deadly attacks in Brussels, De Standaard newspaper reported.

According to preliminary information, the man arrested was seen at the Metro Station in Maalbeek with Khalid El Bakraoui before the explosion.

It was reported police recognised the man from CCTV footage.

Belgium's interior and justice ministers offered their resignations over the Brussels attacks but they were rejected by Prime Minister Charles Michel, Belgian media said on March 24.

Revelations from Turkey that it had informed Belgium that at least one of the bombers in the March 22 Brussels attack was a jihadist fighter have rocked the Western European country after authorities failed to prevent the deadly assault.

The two brothers who blew themselves up in the deadly train and airport attacks in Brussels were known by police for serious crimes and are linked to last November's Paris massacre.

Khalid and Ibrahim El Bakraoui are Belgian nationals with major convictions "not linked to terrorism," federal prosecutor Frederic Van Leeuw said at a dramatic news briefing on March 23.