The New York Police Department was called to 770 Eastern Parkway in Crown Heights on Monday, where a number of Chabad students — most in their teens and early 20s — mounted a last stand against attempts to fill in the tunnel connecting the synagogue to the defunct Chabad mikvah around the corner.

In December, the rabbi discovered youths had dug tunnels beneath the building to access another property on the same street.

The young men have for years been at loggerheads with the synagogue over who owns the main property, but the appeal of the ritual bath or mikvah is unclear.

When cement diggers and construction workers showed up to fill the tunnel, the young men protested, throwing themselves in the way to block their efforts.

It took the NYPD to forcibly remove them. Videos of the incident were later shared on social media.