Intelligence agencies believe ISIS has developed ways to plant explosives in laptops and mobile phones that can evade airport security screening methods.
The warning by security services has led to Britain’s airports and nuclear power stations being instructed to tighten their defenses against terrorist attacks.
It is this new information which is thought to have led the US and Britain to ban travelers from a number of countries carrying laptops and large electronic devices on board.
Now there are concerns that terrorists will use the techniques to bypass screening devices at European and US airports.
Some experts fears terrorists made a breakthrough after obtaining airport screening equipment to allow them to experiment.
FBI experts have tested how the explosives can be hidden inside laptop battery compartments in a way that allows a computer still to be turned on.
Manny Gomez, a former FBI special agent, said: “We had the shoe bomber, cartridge attempt, now this is the next level. We need to be several steps ahead of them.”
Last year al-Shabaab, the Islamist terror group based in Somalia, detonated a bomb on a flight from the capital Mogadishu to neighboring Djibouti.
The explosives were hidden in a part of a laptop where bomb-makers had removed a DVD drive.
The bomber was blown out of the window but the plane survived.