Paris security forces on high alert ahead of Olympics amid looming terror threats, request assistance from several countries to help secure the games with police and military forces.

Paris police reported on Thursday that an assailant stabbed a policeman in the city center, near the Arc de Triumphe, was shortly neutralized, and later succumbed to his wounds. Although there is no suspicion of terrorism or connection to the Olympic Games, the incident adds to the tension in Paris ahead of the Olympic Games next week.