US cities from Boston to New York and Philadelphia are shutting down against a monster storm that could unload up to three feet of snow on a region of more than 35 million people.

A 4-year-old child brought a gun outside his home shot and shot a 6-year-old neighbour in the head when the weapon fired as they played.

The motorist who collided with George Clooney in New Jersey on Friday has insisted he will not be pressing charges.