Immigration and Customs Enforcement agents attacked 2 members of the media ... and one ended up on a stretcher.

The violence went down at a New York City immigration court Tuesday after several masked agents entered an elevator with 2 detainees ... when a photographer walked in the elevator -- a public elevator, to be clear -- and was physically forced out by the agents. Getty

In the commotion, another agent -- not in the elevator -- rushed up and hurled another member of the media, who then bumped into another member -- think human dominoes. The third person went down hard ... agents offered no aid as the elevator doors closed. Getty

The victim -- freelance photographer L. Vural Elinor of the Anadolu Agency -- writhed on the ground before emergency medical personnel arrived,

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