U.S., Dutch and Japanese officials are close to an agreement to limit China’s access to technology used to make computer chips, a Dutch semiconductor supply company confirmed Sunday.

ASML, a leading maker of semiconductor production equipment based in Veldhoven, Netherlands, said it was possible an agreement had already been reached but that it didn’t know any details about the deal or how it would affect ASML’s business.

ASML is the world’s only producer of machines that use extreme ultraviolet lithography to make advanced semiconductor chips. The Dutch government has prohibited ASML from exporting that equipment to China since 2019, but the company had still been shipping lower-quality lithography systems to China.