The suspected Brussels bomber Najim Laachraoui is now believed to be dead, reports say.
Initial findings suggested Laachraoui was the only attacker still at large, after he was seen at Brussels airport with two other men who detonated themselves, killing 10 people.
But now there is uncertainty over who the fugitive actually is.
What is known so far is that there were four bombers in total who coordinated two separate attacks across Brussels – two blasts at Zaventem airport and then one at Maelbeek metro station.
Two of the four bombers are known to be brothers, one of whom has been identified among the bodies at the airport as Brahim el-Bakraoui.
His brother Khalid was initially thought to have blown himself up in a carriage of the Brussels metro, while another suicide bomber back at the airport remained unidentified.
Laachraoui was thought to have left the airport before the bombs detonated.
But, in recent reports from Belgian investigators -- it is understood Laachraoui may infact be the second body found at the airport, suggesting authorities are now back on the hunt for an unknown offender.
Brussels attacks: As they happened