Foxconn Technology said mainland authorities were investigating allegations that at least one of its executives accepted bribes from suppliers.
The statement came after Taipei-based weekly Next Magazine reported that a Foxconn executive was arrested in Shenzhen in September as part of a bribery probe. Foxconn confirmed that authorities were investigating the allegations.
The firm denied "most" of the report in Next's January 10 issue, without giving specifics, and said in the e-mailed statement that it was evaluating internal controls and adjusting purchasing rules.
The Taipei-based group spoke to agents working with Samsung Electronics, Sony and Panasonic during an internal probe, Next reported, citing people with knowledge of the matter it did not identify.
Foxconn did not name any companies in its statement.
Two Foxconn managers have not been at work and are the focus of the internal investigation, Next reported.
A Foxconn spokesman declined to comment on their whereabouts.
Sony and Panasonic spokeswomen said they had not confirmed the content of the Next article and were unable to comment. No one was immediately available for comment at Samsung's media relations office.
The allegations were reported by Foxconn to mainland law enforcement authorities and involved a unit responsible for buying surface-mount technology equipment and components worth tens of billions of yuan last year, Next reported.
It did not give a figure for the value of the alleged bribes.