Cardinal Sean O'Malley has accepted responsibility for failing to respond to a letter detailing sexual abuse allegations against former Cardinal Theodore McCarrick.

The letter, sent by Fr Boniface Ramsey, contained details of Archbishop McCarrick's illicit behaviour with seminarians but was not followed up. McCarrick was eventually stripped of his title by the Vatican in June, following credible allegations of sexual abuse from a former altar boy.

In a statement published on the Archdiocese of Boston's website, Cardinal O'Malley explained the failure as an oversight on the part of his secretary, Fr Robert Kickham.