**BREAKING**
As protests in Philadelphia turn violent after a man armed with a knife was shot and killed by police, a line of police officers, who appear to have been containing rioting, was run down by a speeding truck which appears to have left the scene.
Watch:
TRIGGER WARNING: The video below shows the vehicle speeding through the line of police officers leaving several on the ground.
Reports from the scene say that the people in the truck have been arrested, but it cannot be confirmed at this time.
Additional videos of looting and rioting from the area:
It appears that police in Philadelphia have a tough night ahead of them. Please keep them in your thoughts and prayers.