Canadian police have arrested a man suspected of stabbing a police officer and injuring four pedestrians in Edmonton, Alberta, on Saturday.
The officer was controlling traffic at a Canadian Football League game when he was struck by a car at high speed and then attacked with a knife.
A second vehicle, believed to be driven by the same man, then hit four others and the driver was later apprehended.
Prime Minister Justin Trudeau has called it a "terrorist attack".
Edmonton Police Service Chief Rod Knecht said the suspect, a 30-year-old male, is likely to have acted alone but they have not ruled out the possibility that others were involved.
According to broadcasters CBC and CTV, a flag belonging to so-called Islamic State was found inside the vehicle that hit the police officer.
The officer and his vehicle were rammed by a white Chevrolet Malibu at about 20:15 local time (04:15 GMT) outside Alberta's Commonwealth Stadium.
The driver then got out of his vehicle and stabbed the uniformed officer several times, before fleeing on foot. The officer was taken to hospital but his injuries are not thought to be life-threatening...............>