By Amber Hildebrandt, CBC News

CBC's Amber Hildebrandt is on the the streets of Toronto and will be filing hourly updates during the G20 summit. Here's the latest.

"This is what a police state looks like," marchers chant at the multiple lines of police in riot gear on Spadina.

The road is packed with marchers who diverted from the planned route back to Queens Park, following behind the black Bloc.

Media are congregated in the median, straining to see both sides of the action.

The drumming band Rhythms of Resistance, a staple of many of this week's protests, are in the middle, setting the tone.

White smoke is rising behind us. There are calls for people to don their lemon juice or vinegar soaked kerchiefs, intended to protect against tear gas. In front, the rows of riot police and mounted police.

One child sits atop a man's shoulders in the thick of it all.

Amber is reporting from @CBCReporters
 

Related: G20 field reports: Amber Hildebrandt

Related: Protests at Queen's Park