Two campaign offices for John McCain, the Republican presidential candidate, have been evacuated after receiving threatening letters
containing white powder, officials say.
The first office to receive the threat was near Denver, Colorado, on Thursday and the second was in Manchester, New Hampshire, authorities said.
"We have put all of our offices on highest alert. They're looking for anything suspicious and all staff has been quarantined as of right now," Jeff Sadofky, McCain spokesman, told Fox News.