India, Aug. 14 -- The US Department of Labor's inspector general has taken the H-1B visa fraud crackdown directly into the field, conducting checks at Dallas-area locations connected to companies that have received hundreds of approved H-1B petitions.

Inspector General Anthony P. D'Esposito traveled to Dallas this week as part of a nationwide investigation into suspected fraud involving the foreign-worker visa program, according to a US Department of Labor Office of Inspector General (DOL OIG) announcement issued August 13.

Investigators conducted door-to-door inquiries at a multi-story building where numerous businesses were linked to more than 500 approved H-1B applications. According to the OIG, several offices appeared inactive, wit...