New York City police are investigating a series of incidents after videos surfaced showing groups of men climbing into and out of the city's sewer network in Brooklyn and Queens.
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Authorities believe the individuals may be searching for valuables beneath the streets, according to US media reports citing police sources. Investigators have not confirmed whether the same group is involved in all of the cases.
Surveillance Footage Raises Questions
Several videos recorded in recent weeks show men removing manhole covers before descending into the sewer system. In one clip, a group is seen entering through a manhole and emerging several hours later.
The unusual activity has prompted an ongoing police investigation as officials work to identify those involved and determine their motives.
Police Respond to Reports
Last week, officers received reports of unidentified individuals lifting manhole covers and entering the sewer system.
According to the New York Police Department, the suspects later left the area in an unidentified vehicle.
“The individuals then fled the location in an unknown vehicle to parts unknown,” the department told the BBC.
Police said no injuries were reported. No arrests have been made, and the investigation remains active.
Officials Warn of Serious Risks
City officials stressed that entering the sewer network is both unlawful and highly dangerous.
A spokesperson for New York City's Department of Environmental Protection (DEP) warned that sewers contain a range of hazards, including toxic gases, unstable surfaces, flooding dangers and confined spaces that can quickly become life-threatening.
The department urged members of the public not to enter any sewer-related infrastructure, including pipes, drains, catch basins, manholes or outfalls.
‘Treasure Hunters’ Suspected
Police sources told CBS News that the men seen in the videos are believed to be urban explorers or self-described “treasure hunters” searching for valuables that may have ended up in the sewer system.
Authorities have not publicly confirmed that theory, and investigators are continuing to examine the incidents.
If identified and arrested, the individuals could face burglary-related charges.
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Adapted by ASEAN Now. Source 3 June 2026
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