The robbers, dressed as policemen, breached the security fence at Brussels Airport and stole the diamonds from the cargo hold of a Swiss passenger jet.
Robbers dressed as police and armed with machine guns have stolen 120 parcels of diamonds worth millions of dollars from the runway of Brussels Airport in one of the biggest heists the industry has seen.
Two vehicles carrying eight men drove up to a van belonging to security firm Brinks, which had just finished loading the diamonds into a Swiss passenger plane, on Monday evening, officials said.
The men, who were masked but also wore police uniforms, did not fire a single shot and the entire heist took less than five minutes, said Ine Van Wymersch, spokeswoman for the Brussels prosecutor's office.
They escaped and are now being hunted by police.