On Thursday, Reuters reported that the United States has expanded the list of nations which are blacklisted from receiving shipments of artificial intelligence chips from Nvidia and Advanced Micro Devices (AMD), adding several Middle Eastern nations to the list.

The details were found in a regulatory filing by Nvidia, which the news agency reported showed the regulations would affect the company’s A100 and H100 chips, which are designed to accelerate machine learning tasks. The company noted the new restrictions would not have any “immediate material impact” on the company’s results.

Reuters reported that a person familiar with the matter told the news agency that AMD, which received a letter outlining similar restrictions being applied to its products, said it saw no material impact on its revenues forthcoming from the new measures.

Neither Nvidia, nor AMD would reveal the new countries which had been placed on the blacklist.

The US Department of Commerce increased its restrictions on exports to China of semiconductor chips used for artificial intelligence, as well as some chip-manufacturing equipment.

The restrictions had first been issued in 2015, as competition increased between the world’s two biggest economies over the domination of key technologies, including the production of semiconductor chips. Although China has been lagging behind the United States in chip development, the nation’s biggest chipmaker, SMIC has been attempting to develop its own capabilities so it will be less reliant of foreign technology.

US semiconductor majors Nvidia, AMD, and Intel have all indicated they will develop downgraded AI chips, with less power for export to the Chinese market.

Although Nvidia did not address any potential reasons behind the increase in its export restrictions, it did note in a filing last year that US officials had informed the company that the export rules “will address the risk that products may be used in, or diverted to, a ‘military end use’ or ‘military end user’ in China.”