This has happened to us before. When we received a complaint from neighbors, we went to the property with a camera recording everything. We then got the attention of every person in the property with a strong vocal voice and told everyone to leave or we are calling the police for violation of private property. Everyone cleared out and we didn't have to call the police. We were recording the entire interaction and everyone's faces were on camera, they knew they were in the wrong and left immediately. We then kicked the hosts out on the same day and told them to get a hotel. We then contacted Airbnb to let them know about the incident.