The U.S. College Board on Wednesday canceled the Scholastic Aptitude Tests for university entrance scheduled for this Saturday in Korea because of another suspected leak of questions.

The move follows an incident in February where some private crammers in Seoul were being investigated on suspicion that they leaked SAT questions.

The College Board said it had no choice but to cancel the May test to protect the credibility of the standardized exams, which are administered around the world.

In an e-mail to registered candidates, the College Board apologized for the inconvenience they had to suffer because of what it called the illegal and unethical conduct of a small group.

Education experts worry that the incident could bring a shame on the country.

