A major snowstorm has brought swathes of the north-eastern US and eastern Canada to a standstill, leaving about half a million homes without power.
High winds and blizzard conditions have emptied the centre of Boston and Massachusetts Governor Deval Patrick has banned all non-essential traffic.
Millions of people across New England have being warned to stay indoors. The region's airports are closed.
Many areas are under two feet (60cm) of snow and more snowfalls are expected. Blizzard warnings are in effect for much of the coastal section of the north-eastern US, from Newark, New Jersey to southern Maine.
Forecasters said the storm, which began on Friday, could dump as much as three feet in some places.
People have been warned to stock up on food and other supplies as the storm affects 25 million people in the region. More than 600,000 homes and businesses are without power in Massachusetts, Rhode Island and Connecticut.
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