From Forbes.com: CHICAGO, Oct 25 (Reuters) - Wal-Mart Stores Inc. said on Saturday it would review the status of its 1.1 million U.S. employees and fire any illegal immigrants on the payroll if U.S. law requires it.

The internal probe at the world's largest retailer comes amid a government investigation into allegations that contractor cleaning crews used by Wal-Mart had recruited illegal immigrants to work on cleaning crews at the stores for the world's largest retailer. The company, which has promised to cooperate with federal officials, said it would scrutinize the background of its own employees to ensure that none are employed illegally.