BEIJING (Reuters) - China said on Monday it has launched an investigation into Nvidia Corp over suspected violations of the country's anti-monopoly law, in a move widely seen as a retaliatory shot against Washington's latest curbs on the Chinese chip sector.

The statement from the State Administration for Market Regulation (SAMR) announcing the probe did not elaborate on how the US company, known for its artificial intelligence (AI) and gaming chips, might have violated China's anti-monopoly laws.

It said that the US chipmaker is, in addition, suspected of violating commitments it made during its acquisition of Israeli chip designer Mellanox Technologies under terms outlined in the regulator's 2020 conditional approval of that deal.

Nvidia did not immediately respond to a request for comment. The company's shares fell 2.2% in pre-market trading in New York after the Chinese regulator's announcement.

The investigation comes after the US last week launched its third crackdown in three years on China's semiconductor industry, which saw Washington curb exports to 140 companies, including chip equipment makers.

In a sign that China intends to fight back strongly against the latest move, shortly after Washington's announcement Beijing banned exports to the United States of the critical minerals gallium, germanium and antimony.

On the same day, four of the country's top industry associations issued a rare and coordinated response saying that Chinese companies should be wary of buying US chips as they were "no longer safe" and buy locally instead.

Nvidia's logo is seen at its corporate headquarters in California

Nvidia has been one of the many companies caught up in the US-China frictions. An earlier round of export curbs by the US stopped Nvidia from selling its most advanced AI chips to China, prompting it to come up with new China-specific versions that were compliant with US export controls.

Nvidia dominated China's AI chip market with a more than 90% share before these curbs. However, it currently faces increasing competition from domestic rivals, chief among them being Huawei. China accounted for around 17% of Nvidia's revenue in the year to the end of January, sliding from 26% two years earlier.