SYDNEY (AFP) - American attorney-general Eric Holder on Friday said his office was reviewing requests from US lawmakers for a probe into News Corp . "There have been serious allegations raised in that regard in Great Britain and there is an ongoing investigation there," Holder told reporters in Sydney, where he is attending a meeting of justice officials. "There have been members of Congress in the US who have asked us to investigate the same allegations, and we are progressing in that regard using the appropriate federal law enforcement agencies in the US."