The U.S. and British governments are telling companies to steer clear of Chinese smartphone maker ZTE.
The Commerce Department said Monday it will prohibit American companies from selling products to ZTE.
The U.S. alleged that ZTE evaded sanctions against North Korea and Iran.
The move will also sever business dealings between ZTE and U.S. firms for up to seven years.
Separately, cybersecurity officials in the U.K. warned mobile carriers to avoid using ZTE equipment. Because of concern that China could use the technology to infiltrate telecommunications infrastructure.
Also, the U.S. and U.K. warned Monday that Russia-backed hackers are targeting millions of routers. In preparation for future cyberattacks.