Coronavirus infections among eight people are tied to a large party where the host had COVID-19 symptoms in Rockland County outside of New York City, health officials said.

Patricia Schnabel Ruppert said at a Wednesday press conference that health workers have been trying to talk to people who tested positive after attending the party in an effort to contain what officials are calling a new coronavirus cluster.

The party was hosted last month in New City, according to NBC New York, and officials in the county believe some of those who attended went on to attend other sizable parties in the area

Rockland County Executive Ed Day said people refusing to help contact tracers were demonstrating “ignorance, stupidity or obstinance.”