"As night fell, an unidentified yacht approached in the dark. Two frogmen, carrying sniper rifles, swam underwater and took up position in front of Suleiman’s house. A wireless signal alerted them. They stood up in the shallow water and fired one bullet each. The bullets hit Suleiman in the forehead and he fell forward, his head coming to rest in the plate in front of him. Nobody heard the shots. Nobody saw the sharpshooters, who quietly slipped away under the cover of darkness".
That, according to Mossad – The Great Operations, a book by Michael Bar-Zohar and Nissim Mishal which was published in Hebrew last month, is how Suleiman met his end.