Three men have been taken to hospital in Milwaukee after a shooting incident in a Sikh Temple.
Hospital spokeswoman Carolyn Bellin said one was in the operating room, another in a surgical intensive care unit and the third was being evaluated in the emergency room.
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Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.
A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.