'Overkill': Images from Ferguson protest show cops treating city like a war zone

As demonstrations in Ferguson, Missouri enter their fourth night, pictures and online posts from the scene show an escalation in response from St. Louis County police.

Despite police insisting, "Your right to demonstrate is not being obstructed," they have brought at least 70 SWAT team officers and one tank to stand opposite the protesters in the street. The Huffington Post reported that state Sen. Maria Chapelle Nadal (D), who criticized the police response in an MSNBC interview on Tuesday night, was taken into custody.

This story has been updated. Please see below.

Wednesday's demonstration is the latest criticizing Ferguson and St. Louis police following the fatal shooting of 18-year-old Michael Brown last Saturday.

Writer and talk show host Elon James White also posted from the scene, saying at least one more person was arrested.

St. Louis Alderman Antonio French, who has been documenting the protests, reported that police have also blocked the suburb off, while training their sniper rifles at a crowd that included a group of children chanting, "Justice for Mike Brown."

And both MSNBC host Chris Hayes and The Guardian reported that police are blocking and arresting media members.

Update, 8:32 p.m. EST: The two journalists arrested have been identified as the Huffington Post's Ryan J. Reilly and Wesley Lowery from the Washington Post.

[Image: Police officers watch as demonstrators protest the death of black teenager Michael Brown in Ferguson, Missouri August 12, 2014. Police said Brown, 18, was shot in a struggle with a gun in a police car but have not said why Brown was in the car. By Mario Anzuoni for Reuters]