The ombudsman has asked the body that oversees public examinations to account for several recent blunders and problems. Ombudsman Alice Tai Yuen-ying said her office would decide whether to launch a formal investigation after listening to the explanations from the Examinations and Assessment Authority. 'When there are too many individual incidents accumulating, people will inevitably [ask] whether the system can be improved,' Ms Tai said. The latest blunder, reported this week, involved a marker for this year's A-level exams allegedly breaking rules by marking papers with the help of a secondary school student. The authority said it was considering reporting the misbehaviour of exam markers to schools and referring cases to the Teachers' Conduct Council, as it had no power to penalise markers who broke its guidelines. In March, an A-level examinations centre distributed language exam papers intended for the afternoon session in the morning.