A securities class action lawsuit has also been filed against the company in a U.S. federal court based on the complaints, Infosys said, adding that it intends to defend itself “vigorously”.

Infosys Ltd said on Thursday that the U.S. Securities and Exchange Commission had launched an investigation into whistleblower claims that Infosys, the software services firm, used 'unethical practices' to boost revenue and profit.

The company said market regulator, the Securities and Exchange Board of India, had also requested additional information from the company concerning the complaints.

A securities class action lawsuit has also been filed against the company in a U.S. federal court based on the complaints, the company said, adding that it intends to defend itself “vigorously”.