A Maine woman interfered with Brewer law enforcement activity, thinking they were U.S. Immigration and Customs Enforcement agents, police said on Wednesday.

Mary Conmee, 63, of Orrington, has been served a court summons for disorderly conduct and obstructing government administration, the Brewer Police Department said in a social media notice.

Officers were investigating a threat against Brewer schools Wednesday morning and staged near a Brewer residence in an attempt to contact a person of interest. During the operation, Conmee “deliberately drove to the scene and interfered with police activity by repeatedly sounding an air horn, refusing lawful orders to leave, and yelling … expletives at officers,” the department stated.

“The woman stated that she ‘didn’t want ICE’ in her neighborhood,” the department’s notice says. “Her actions interfered with legitimate law enforcement operations and created a real risk to the investigating officers.”

Police later determined the person of interest was not involved in the school threat, the department said. The threat stemmed from similar “swatting” incidents at other Maine schools on Wednesday, police say, and there was no credible threat to Brewer schools.