Secret Service agents hauled Mr Trump to safety as panic ensued. The incident erupted while he was addressing the crowd.
Initially there were unconfirmed reports that the man was armed, although it was unclear how he could have brought a gun through the security checks.
Further investigation of mobile phone footage of the incident indicated that there was no weapon.
A white man, believed to be in his 30s or 40s, was taken away by police and security guards for questioning.
Trump rushed off stage by Secret Service at Reno rally
06 November 2016
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Donald Trump had to be rushed off the stage in a security alert at a rally in Reno, Nevada.
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