Apology comes as former Adelaide festival board member accuses Louise Adler of hypocrisy after she resigned citing free speech concerns

About 100 writers and four board members quit Adelaide Festival after it barred author Randa Abdel-Fattah.

More than 70 prominent figures are boycotting the Adelaide Festival for dropping Palestinian-Australian author Randa Abdel-Fattah in the wake of the Bondi attack