I have seen so many reports from the past 2 years about unidentified people climbing in and out of manholes around New York City. They don’t look homeless to me, they seem to always be in groups, they look organised. I am not from the USA so I am unaware of any context that would make this normal. Sometimes they have shovels, head lamps, and other tools. It doesn’t seem like an underground club, rave or art scene. Does anyone living in the area have any more insight?