TSMC has denied a report that it is under investigation by the U.S. Commerce department for supposed dealings with Chinese tech company Huawei. The statement comes a day after a separate report claimed that a TSMC chip had been found in a Huawei product.

Notably, TSMC has maintained that it has not done any business with Huawei since mid-September 2020, when stricter US sanctions were enforced. The company also claimed that it has not manufactured any chips for Huawei since the new restrictions came into effect. On its part, Huawei denied ever launching the 910B chip.

An investigation of Huawei Technologies Co.’s latest AI offering has unearthed an advanced processor made by Nvidia Corp. manufacturing partner Taiwan Semiconductor Manufacturing Co., suggesting that China is still struggling to reliably make its own advanced chips in sufficient quantities.