U.S. authorities are investigating reports that a large Indian technology company misused short-term business visitor visas to send low-cost workers from India for long-term work in the United States.

The allegations against Infosys Technologies were first raised in a lawsuit earlier this year by one of the company’s U.S. managers, Jack Palmer. He charged that Infosys officials in India plotted to “creatively” get around U.S. visa restrictions for highly skilled foreign workers.

Infosys has denied the accusations and says it is committed to “absolute compliance” with U.S. visa laws.

An Infosys founder, Narayana Murthy, voiced concern about the allegations at a company board meeting this past weekend, his last before retiring. He said he felt sad about a subpoena the company received from a U.S. federal grand jury investigating the case. He said the dispute will be “decided on its merits in due course.”