NATO protest turns violent, Black Bloc fights with police; Update: Riot police put on gas masks, may use 'deterrent noise'; Update: Journalist injured, sound cannon in use

Violence erupts at the end of the NATO Summit protests.

https://twitter.com/#!/AntDeRosa/status/204330759291539456

https://twitter.com/#!/bombshellmcfe/status/204334336504365057

There is a live feed to follow.

https://twitter.com/#!/AntDeRosa/status/204331587410722818

https://twitter.com/#!/_BryanCrawford/status/204329817074708480

https://twitter.com/#!/abalderrama/status/204332247602577409

https://twitter.com/#!/Governatorial/status/204334537956798464

Earlier today, members of Black Bloc were arrested for plotting to attack police stations, Mayor Emanuel’s home and President Obama’s campaign headquarters.

Twitchy will monitor the situation and update accordingly.

Update: People on the scene report police moving in.

Riot cops have moved onto the sidewalk. Getting out of here.

— Joanne Stocker جوآن (@joanne_stocker) May 20, 2012

Jonathan Hoenig, who has been live tweeting the NATO protest all day, reports:

MT @missADelgado: Props to @jonathanhoenig who has withstood #OWS stench to bring us live reporting // Have to go soon. Police moving in

— Jonathan Hoenig (@JonathanHoenig) May 20, 2012

UPDATE:

https://twitter.com/#!/Chicagoist/status/204333378957352960

https://twitter.com/#!/AnnaTarkov/status/204337582056812544

https://twitter.com/#!/allisonkilkenny/status/204334050826129408

https://twitter.com/#!/rebeccafeldman/status/204337999398449152

The ACLU instigates.

https://twitter.com/#!/ACLUofIL/status/204338449975742464

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Concern for journalists on the scene.

https://twitter.com/#!/PaulaGomez/status/204339290354888704

UPDATE:

https://twitter.com/#!/katiekormann/status/204340781895528448

https://twitter.com/#!/JoseAVillalobos/status/204340008381988865

Photos from on the scene.

https://twitter.com/#!/_Mikeeeey/status/204340016309211136

People of Chicago are fed up with the protesters and their violence.

https://twitter.com/#!/JustDwana/status/204340750878646273
https://twitter.com/#!/VillySince1986/status/204340058667499523
https://twitter.com/#!/RedZoneRebels/status/204341309014679552
https://twitter.com/#!/aguti20/status/204341304161878016

https://twitter.com/#!/allisonkilkenny/status/204340224560594945

A sign that they are getting ready to have to use “deterrent noise” to control the violent crowd of protesters.

But it’s the TEA party that is violent and hateful, huh?

UPDATE: 6:50 p.m.

https://twitter.com/#!/nbcchicago/status/204343202336096256

https://twitter.com/#!/Jiraffa/status/204343598769119233

https://twitter.com/#!/JonathanHoenig/status/204343368552153088