Police in the Canadian city of Moncton, New Brunswick are urging residents to stay inside with their doors locked as they continue the search for a gunman who killed three officers and wounded two more.
In a tweet, the Royal Canadian Mounted Police said:
More top news
Not as cold as recent nights - any frost will be confined to parts of Scotland and East Anglia where temperatures will dip below freezing.
A police chief constable has defended his force's handling of child sex allegations against former prime minister Sir Edward Heath.
John Cleese has paid tribute to his "wonderful" Fawlty Towers co-star, Andrew Sachs, following his death at the age of 86.