According to the UK Mirror:
Counter-terror chiefs fear Islamist fanatics plan to launch deadly bomb attacks on the UK’s streets using unmanned toy drones.
Both MI5 and police battling the threat of an IS outrage in Britain believe the network has experimented with planting high explosives on the tiny flying machines.
The agile drones could lift enough C4 plastic explosive to kill or maim a person if detonated near someone’s head by remote control or a timer.
Sources told the Mirror that police probing IS plots against UK citizens believe terror bosses want to launch a multi-drone attack.
This could mean flying the helicopter-style toys by remote control into crowds at an open-air music festival or a football ground.