Fresh questions are emerging over FlyDubai co-pilot Hamam al-Hammami as investigators probe his reported extremist links, years in Syria and online activity. He was allegedly grounded by Oman after extremist material was found, raising questions over how he later passed background checks and ended up on an Israel-bound flight. Investigators are examining possible radicalisation, security lapses and whether he acted alone or had links to a terror group, while authorities in the UAE, Saudi Arabia and Israel investigate the cockpit attack.