Ten brazen gunmen raided an exclusive underground weed party in NoMad, holding up at least 40 guests getting high at the unlicensed event, police said.

The underground gig was in full swing on Broadway near W. 28th St. when the gunmen burst into the place waving their pistols around about 10 p.m. Monday, cops said.

The crooks robbed the guests of their cash, wallets, jewelry, and cell phones before running off. They have not been caught.

Cops were scouring the area for surveillance footage Tuesday that could help them track the 10 suspects.