Google has cut phone maker Huawei off from some updates to the Android operating system, dealing a blow to the Chinese firm.
New Huawei smartphones will also lose access to popular Google apps.
The move comes after the Trump administration added Huawei to a list of companies that American firms cannot trade with unless they have a licence.
In a statement, Google said it was "complying with the order and reviewing the implications".
Huawei declined to comment.
The move by Google, first reported by Reuters, means Huawei loses Google's security updates and technical support, and any new devices would no longer have apps such as YouTube and Maps.
Huawei can still use the version of the Android operating system available through an open source licence.
Ben Wood, from the CCS Insight consultancy, said the move by Google would have "big implications for Huawei's consumer business".
Last Wednesday the Trump administration added Huawei to its "entity list", a move that bans the company from acquiring technology from US firms without government approval.
Huawei faces a growing backlash from Western countries, led by the US, over possible risks posed by using its products in next-generation 5G mobile networks.
Several countries have raised concerns that Huawei gear could be used by China for surveillance, allegations the company has vehemently denied.
Huawei has said its work does not pose any threats and that it is independent from the Chinese government.
Still, some countries have blocked telecoms companies from using Huawei products in 5G mobile networks.
So far the UK has held back from any formal ban.
"Huawei has been working hard on developing its own App Gallery and other software assets in a similar manner to its work on chipset solutions. There is little doubt these efforts are part of its desire to control its own destiny," said Mr Wood.
-- Courtesy of BBC News