NEW YORK (AP) — Lawyers for Wal-Mart Stores Inc. have identified Brazil, India, China and South Africa along with Mexico as areas having the biggest risk for corruption, according to a letter from two congressmen who are doing their own investigation into the allegations of bribery in its Mexico operations.

The letter, dated Monday, shed light on a May 21 briefing with outside lawyers from Wal-Mart, who said they had been retained to do a global anti-corruption compliance review of its operations in 2011.