Suspicious letter addressed to US President Obama has tested positive for the deadly poison ricin, as did a letter to a Republican Senator.
The FBI assessment is that there are no links between the poison letters to Obama and Senator Roger Wicker and the bombs at The Boston Marathon.
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Police have raided another address in Moss Side as they investigate the Manchester Arena attack.
A band of heavy, thundery showers moves in from northern France this afternoon.
Armed police were out in force as runners competed in the largest public event in the city since Monday's terror attack.