One of the Brussels bombers left a suicide note telling how he was desperate to blow himself up because he did not want to go to prison like his friend, Paris bomber Salah Abdeslam, Belgiums chief prosecutor revealed today.Ibrahim El Bakraoui, who helped kill 14 people when he set off his suicide vest at Brussels airport yesterday, left the will in the bin of the terror cells Schaerbeek safehouse. The note, found next to 15kg of homemade explosives, an AK-47 and an ISIS flag, said: I dont know what to do. Im in a hurry. Im on the run. People are looking for me everywhere. And if I give myself up then Ill end up in a cell.Meanwhile, Brussels master bombmaker Najim Laachraoui – known as the Man in White – is still on the run today after evading a series of special forces raids following the deadly attacks which killed 34 yesterday.Belgiums chief prosecutor this afternoon confirmed is still at large after Belgian media reported the ISIS explosives expert was taken alive by a SWAT team inside a pizzeria in the Anderlecht suburb of the city.The latest twist came after Belgian brothers Ibrahim and Khalid El Bakraoui were named as two of the ISIS suicide bombers – eight days after they escaped police in a gunfight – and it is now clear there is a mystery fourth suicide bomber.Laachraoui is suspected of rigging up the suicide vests that helped kill 34 in twin attacks yesterday – and is believed to have done the same for the Paris terrorists who murdered 130 in November.He went on the run after leaving a suitcase packed with explosives and calmly walked from the terminal moments before the airport massacre at 8am Tuesday. Today federal prosecutor Frederic Van Leeuw said it was the largest of all the bombs but it failed to go off.