Taiwan Semiconductor Manufacturing Company (TSMC) said on Tuesday it has informed the United States of a potential attempt by Huawei to circumvent U.S. export controls prohibiting the chipmaker from producing AI chips for the Chinese company.

TSMC has advised the U.S. that there was an attempt by Huawei to violate sanctions against China restricting the export of AI chips to China, as the probe that could affect Apple chip production rolls on.

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.