PITTSFIELD – Four minors and an adult have been charged with liquor violations after a weekend party on Chester Street.

Tammy Higgins, 44, was charged with furnishing liquor to minors and furnishing a place for minors to consume alcohol after she reportedly bought a keg of beer for a group of her child’s friends.

Officer Rodney Minoty began the investigation when he stopped an erratic vehicle on Route 100 at 4 a.m. Sunday. He charged the driver, Stuart Allen, 18, of Pittsfield, with operating a vehicle while under the influence after his blood alcohol content was determined to be 2 1/2 times the legal limit for adults.

Higgins then was charged later that morning, along with three minors, who were cited for illegal possession of alcohol by consumption.