Over in Crown Heights, a tunnel was discovered burrowed under 770 Eastern Parkway, Chabad Lubavitch Headquarters.

A resident on Union Street got concerned upon repeatedly hearing strange noises at night. The resident eventually reported it to "someone". 

I am not sure who that "someone" is - was it the police? a city inspector? his wife or her husband? to the neighbor?

Construction workers near 770 were then surprised to discover a tunnel while they were laying a new waterline. Some further investigation led tot he discovery of the tunnel burrowed from the mikva on Union Street to the mikva under the womens section of 770. Not overly familiar with the area I looked on Google Maps and it seems to be about two blocks between the two ends of the tunnel.

The women's section of 770 has now been sealed off as being considered unsafe. It seems the tunnel has made the area unstable.

source: Crown Heights Info

It seems to still be unknown exactly who is responsible for the tunnels and why they dug them.

Obviously this was done at a fraction of the cost of the tunnels built by Hamas in Gaza. They should have applied to Qatar for a grant. In the meantime, Qatar is cutting back funding to Hamas telling them to go learn from Crown Heights how to dig tunnels at wholesale prices.

Nobody thought it was strange these people were frequently going in and out of a womens mikva (on both sides)? They dug at night while women were using the mikva?