Riot outside Pittsburgh jail: Windows shattered, officer injured

A protest turned into a riot outside a Pittsburgh jail, leaving an officer injured, jail windows broken and car windows shattered Monday night.

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Approximately 20-25 protesters wearing masks and bandanas started throwing rocks and setting off fireworks, public safety officials said in a release. Eleven protesters were arrested, and officials released their mugshots.

Two bike officers who were first to arrive tried to arrest a demonstrator, resulting in one officer’s minor injury, officials said in a statement.

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The protestors, many of them dressed in dark clothing, escaped in different directions, leaving windows shattered and the Municipal Court Building graffitied. One sheriff's vehicle also suffered damage.

The arrested protesters were found with knives, drugs and at least one firearm, public safety officials said.

Police say many of the protestors were associated with the Allegheny County Jail Health Justice Project.

However, that group told Fox News police and the jail warden had made a “false accusation” against them.

"The Allegheny County Jail Health Justice Project did not organize the events that occurred outside of the jail," the organization said in an email to Fox News. "However, we sympathize with those who showed their frustration about the abuses that are occurring inside the jail."