Democratic presidential hopeful Bernie SandersBernie SandersSanders, Dems defend ObamaCare at Michigan rally Sanders: Not a 'bad thing' if Comey resigns Sanders: Trump should tweet support for Medicare, Social Security MORE was briefly interrupted Thursday during a speech in Chicago after a woman holding a sign charged the stage.

Sanders put up his hand to signal for the woman to stop, and a Secret Service agent ran on stage to shield the Vermont senator.

The woman was later escorted out of the venue.

The Sanders campaign, Secret Service and local police have not issued any statements on the incident.