After Bovino threw the can, the Star-Tribune wrote, “plumes of green and gray smoke burst over the crowd,” causing protesters and observers to flee the scene.

That is probably not normal tear gas (which is bad enough), it's likely HC smoke which is extremely carcinogenic (arc).

If there is any justice for any of this someday there's going to be a massive settlement and taxpayers are going to be paying for cancer and hospice treatment for thousands of people affected by this in a couple of decades.

e; There was a good step by step guide for disarming these somewhere that I can't find right now, but if memory serves it was 1. Approach with leaf blower to direct smoke away from you, 2. Drop a traffic cone over the grenade to contain its smoke a bit more, 3. Dump a mixture of water and baking soda into the cone and drown the grenade.

e2; We don't have definitive information that this is what it looks like for sure yet, so I added the two italicized words.