Three buildings in Greenwich Village were evacuated Saturday after a police arrest squad found something that looked like explosive powder in an apartment.
A police spokesman says the department's warrant squad went to the home to look for a woman Saturday morning and spotted the white substance in an ashtray. It was removed to a police firing range for analysis.
Police say investigators also found a shotgun and two magazine clips for handguns.
Two people are in custody, including the woman and a male companion.
The buildings were evacuated as a precaution.