The Remote Control Project hosted by leading security thinktank Oxford Research Group looked at more than 200 drones and concluded that they will be used as "simple, affordable and effective airborne improvised explosive devices," The Guardian reported.
"The UK government, police, military and security services will need to introduce countermeasures to reduce or mitigate the risk of commercially available drones being used for attack," the experts warned.
"The use of drones for surveillance and attack is no longer the purview of state militaries alone. A range of terrorist, insurgent, criminal, corporate and activist groups have already shown their desire and ability to use drones against British targets," said Chris Abbott, the lead author of the report and visiting research fellow at Bradford University's School of Social and International Studies.
"Drones are a game changer in the wrong hands. The government needs to take this threat seriously and commit to a range of countermeasures that still allow for legitimate commercial and personal use."
The report pointed out that the Islamic State (IS) is already using drones for reconnaissance in Iraq and Syria.
"Islamic State is reportedly obsessed with launching a synchronised multi-drone attack on large numbers of people in order to recreate the horrors of 9/11," it noted.