Looks like Saturday’s Keith Urban concert got a little too wild in Mansfield, Massachusetts. Billboard reports that emergency crews from six neighboring towns were called to the Xfinity Center, which is located 30 miles south of Boston, following numerous reports of alcohol-related illness.

Fire officials declared a mass casualty incident at the venue, which indicates a large number of people with potential illnesses or injuries. According to fire and police reports cited on WCVB.com, 46 people required medical treatment and 22 were transported to a local hospital. In addition to an unspecified number of arrests for intoxication, more than 50 people were taken into protective custody.