Three people have been killed by a gas leak explosion in New York, NBC New York reported.
Nearly 70 people were hurt and others are missing after two buildings collapsed following the explosion in upper Manhattan, officials said.
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Very young children are just as likely to spread the disease as they are to catch it, a health chief warned.
Anger at the verdict in the shooting of black teenager Michael Brown has left the US deeply divided during its celebration of togetherness.
For most of the country, tomorrow is set to get off to a more pleasant start as it should be drier and brighter with the odd sunny spell.