CHICAGO (AP) -- Republican presidential candidate Donald Trump cancels rally in Chicago due to security concerns.

Republican presidential candidate Donald Trump has cancelled a rally in Chicago, calling off the event due to safety concerns after protesters packed into the arena where it was to take place.

The announcement that Trump would postpone the rally for another day led the crowd inside the University of Illinois at Chicago Pavilion to break out into raucous cheers.

Meanwhile, supporters of the candidate broke out into chants of "We want Trump! We want Trump!"

There was no sign of Trump inside the arena on the college campus, where dozens of UIC faculty and staff had petitioned university administrators to cancel the rally. They cited concerns it would create a "hostile and physically dangerous environment" for students.

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