Unconstitutional actions by fededal police in Portland?

I can't verify the video, but if it's true - is this action constitutional?

https://twitter.com/sparrowmedia/sta...36911307218948

Quote:

The Sparrow Project @sparrowmedia Militarized Federal Agents from a patchwork of outside agencies have begun policing Portland (in rented minivans vans) without the explicit approval of the mayor, the state, or local municipalities. This is what that looks like in practice:

There seems no way of identifying the officers - no ID numbers that I could see, just "Police" patches.

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