Donald Trump rushed off stage at Nevada rally

US Republican presidential candidate Donald Trump has been rushed off stage by security agents at a rally in Reno, Nevada, after a perceived threat in the crowd.

Two security agents grabbed Mr Trump by the shoulders and rushed him backstage.

The threat was unclear.

Mr Trump returned to the stage a short while later to continue his rally speech.

Both candidates are making their closing arguments to American voters, crisscrossing the US in hopes of convincing last-minute undecided voters.

More to come.

PHOTO A member of the Secret Service pulls Republican presidential candidate Donald Trump from the stage.

AP: JOHN LOCHER