The attack in Barcelona is the latest major terrorist outrage to hit Europe in recent years.

A man who stabbed a police commander and police administrator to death at their home in a Paris suburb pledged loyalty to the leader of the Islamic State (IS) group and had a list of other targets, including rappers, journalists, police officers, and public officials, the Paris prosecutor said.

A Frenchman suspected of killing two police officers declared his allegiance to Islamic State (IS) leader Abu Bakr al-Baghdadi and threatened to kill non-believers, according to Paris prosecutor Francois Molins.

A man with a past terrorist conviction shot video footage during a fatal knife attack on two police officers outside Paris, according to French officials.

A knife-wielding attacker has stabbed a senior police officer to death outside his home in a suburb of Paris.