Protests have erupted across New York and in US cities from Georgia to California after a white police officer was cleared over the chokehold death of an unarmed black man.

Protests have broken out in New York City after a white police officer was cleared of blame over the chokehold death of an unarmed black man stopped on suspicion of selling untaxed cigarettes.

A school bus driver has been accused of creating a hierarchy among his preteen and young teen charges that encouraged older students to bully younger ones to keep order.