From UK Express
By Scott Campbell
Counter terrorism officials in Spain warned that around 800 jihadists are preparing to launch attacks in Europe and Britain.
Spanish counterterrorism sources revealed that the al-Qaeda and Islamic State extremists are living in Europe waiting for the order to commit terrorist atrocities at the right moment.
It is thought that 350 are Britons who have returned from Islamic State-controlled territories abroad.
An insider said: “These people are not well trained, but they are poised and prepared to do anything.
"Once they have been indoctrinated, they receive the minimum training."
All of their movements are being tracked by authorities but some of them have gone missing, The Times reported.
Francisco Martínez, Spain’s security minister, said last week: “These young men are so quickly converted to support Islamic State, and in a few weeks they become fanatics.
"They go to war zones or they stay where they live and act like lone wolves.”
The shock warning comes just days after a crazed gunman tried to open fire on a packed train in France.
Officials reportedly believe Ayoub El-Khazzani, suspected of committing the attack, was briefed by others before boarding the high-speed Thalys train in Amsterdam.
The 26-year-old Moroccan was tackled to the floor by three Americans, including two US military personnel, and a British man after they heard him loading an AK-47 on the high-speed Thayls train from Amsterdam to Paris on Friday.
A Spanish anti-terrorist official, who spoke on condition of anonymity, revealed El Khazzani had lived in Spain until last year, moved to France then travelled to Turkey then Syria where he is believed to have trained with ISIS before returning to France.
He was also arrested in Spain at least once for a drug-related offense, the source revealed.
But the man's lawyer has claimed his client had been shocked and surprised "to the point of being amused" when he was arrested.
Britain's terror threat level is currently severe, meaning an attack on the country is highly likely.