A shooting rampage by an Islamic State supporter in Vienna that killed four people is the latest in a spate of such atrocities in Europe. A recap of the deadliest attacks since 2015.
The terrorist threat against Europe has mutated in the last half-decade as jihadist groups have seen their Middle East sanctuaries eroded, but analysts say the West must remain braced for more attacks
The imminent fall of the Islamic State's caliphate in Iraq and Syria has left many countries grappling with what to do with jihadists who want to return.
An Iraqi court says it has condemned to death by hanging a German woman of Moroccan origin after finding her guilty of belonging to the Islamic State jihadist group.
Spain reels after a van ploughs into a popular promenade in central Barcelona, crashing into pedestrians and leaving a trail of death and injury.