DUBLIN — The lead singer of the Irish rock band The Cranberries, Dolores O’Riordan, has pleaded guilty to assaulting three policemen and a flight attendant during an alleged psychotic episode last year.

O’Riordan didn’t speak during Wednesday’s court hearing in western Ireland. Her lawyer said she accepted evidence of the assault and obstruction charges facing her.

Judge Patrick Durcan ordered the singer to write letters of apology to those she attacked. Durcan said he would sentence her early next year. She faces possible penalties ranging from a cash fine to six months’ imprisonment.