Hillary Clinton campaign headquarters evacuated after white powder found in envelope
The campaign headquarters for U.S. Democratic presidential candidate Hillary Clinton was evacuated late last night after a white substance was discovered in an envelope, police said.
The substance was first discovered by two interns at a campaign office in Manhattan and was taken to Clinton's Brooklyn headquarters, triggering the evacuation of the 11th floor, a New York Police Department spokesman said.
A total of four people were exposed to the substance, police said, though there have been no injuries or reported illnesses.
Police are testing the substance and investigating the case.
Further details were not immediately available.
The troubling development comes as Mrs Clinton's campaign is increasingly preparing for the possibility that Republican rival Donald Trump may never concede the US presidential election should she win.
That scenario could enormously complicate the crucial early weeks of Democrat Mrs Clinton's preparations to take office.
Aiming to undermine any argument brash billionaire businessman Mr Trump may make about a "rigged" election on November 8, she hopes to roll up a large electoral vote margin when Americans go to the polls, which could repudiate his message and project a governing mandate after the bitter, divisive presidential race.
Mrs Clinton's team is also keeping a close eye on statements by national Republican leaders, predicting they could play an important role in how Mr Trump's accusations of electoral fraud might be perceived, according to several Clinton campaign aides.
Campaign officials stress they are not taking the outcome of the election for granted, but Mrs Clinton and her team have begun thinking about how to position their candidate during the post-election period.