LONDON (AP) — China accused Nvidia on Monday of violating the country’s antimonopoly laws and said it would step up scrutiny of the world’s leading chipmaker, escalating tensions with Washington as the two countries hold trade talks this week.

Chinese regulators said a preliminary investigation found that Nvidia didn't comply with conditions imposed when it purchased Mellanox Technologies, a network and data transmission company.

The one-sentence statement from the State Administration for Market Regulation statement did not mention any punishment, but said it would carry out “further investigation."

Nvidia didn't respond to a request for comment.

Regulators said in December that they were investigating the company for suspected violations stemming from the $6.9 billion acquisition of

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