Large groups of men twice seen climbing in and out of manholes in Brooklyn for unknown reason

Source: New York Post

New York City might have a Teenage Mutant Ninja Turtle problem. Trespassers were seen climbing into an open manhole on a Brooklyn street early Friday morning not once, but twice, cops said.   Just like the movie creatures who famously lived in the city sewer system, the group of about a half-dozen men have been spending hours in the slimy underground.