Witnesses reportedly heard the helicopter making a strange sound before it plummeted and erupted into a giant fireball The helicopter, which went down shortly after 6pm local time (4pm UK time) on Monday (August 17), erupted into flames on the popular Greek tourist island of Sifnos, killing all three on board Key points and original sources are listed below.

• Witnesses reportedly heard the helicopter making a strange sound before it plummeted and erupted into a giant fireballS1

• The helicopter, which went down shortly after 6pm local time (4pm UK time) on Monday (August 17), erupted into flames on the popular Greek tourist island of Sifnos, killing all three on boardS2