A suspicious letter sent to US President Barack Obama has been intercepted at a mail screening facility, Reuters reports.
The letter addresses to Obama, contained a "suspicious substance" authorities have told NBC News.
"A letter addressed to the president was received at a remote screening facility containing a suspicious substance. We are working closely with Capitol Police and the FBI in this investigation," a Secret Service spokesman said.
It comes as it was reported that two letters containing the poison ricin were sent to the US Senate yesterday and today.
More top news
After a wet start for many, a frontal system continues to clear eastwards leaving showers across the UK
Further doubt was cast on David Cameron's credentials as a football fan after he suggested a Britain team takes part in internationals
European football might not want him, but most of the rest of the world does - and very soon that support will drift into the ballot box.