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.
More top news
The Prime Minister has been warned that she must make a decisive choice about what kind of trade deal she wants after Brexit.
A former Save the Children boss has admitted he faced complaints about "inappropriate" behaviour during his time in charge.
Dennis Banfield, 87, broke down in tears as he said he was delighted to be able to secure his children's future.