44 people were arrested Saturday while filming a music video on the roof of Lower East Side apartment building, the city police department said.

It happened round 4 p.m. Saturday at the Baruch Houses.

Police said they were shooting a video for Brooklyn-born rapper China Mac.

They now face criminal trespassing charges.

Officers said they found two imitation guns and one real firearm at the scene.

It is not clear if anyone from the group lives in the building.