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
NHS trusts are denying thousands of women across Britain fertility treatment in a bid to cut costs, a health watchdog has warned.
Overhaul of NHS would include workplace weight-loss schemes with money and shopping voucher prizes.
It is a wet and windy picture for many tonight, with the worst in the northwest.