Republican presidential nominee Donald Trump was in Minneapolis Friday night for a fundraiser held at the city’s convention city that was besieged outside by violent liberal protesters.

Trump supporters attending the rally were punched, spit on and robbed while Trump’s Secret Service motorcade was blocked by protesters who jumped on one of the vehicles.

Update: Protests at Donald Trump event turn unruly late. Police: No arrests, minor damage. https://t.co/T6fT3A7dk1 pic.twitter.com/RbJLBZK024 — Star Tribune (@StarTribune) August 20, 2016

(Note: The Star Tribune played down the violence and harassment by the liberal protesters.)

The violence, while anticipated, was for some reason not prevented by the employment of common crowd control techniques.

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MinnPost reported on concerns law enforcement had about violent liberal protesters at planned Trump campaign events in Minneapolis that led Trump to cancel a rally and relocate the site of a fundraiser.