Keith Krach, US under-secretary of state for economic affairs, warned Italy and Germany that they should reconsider the use of Huawei gear, Reuters reported.
Krach did not provide any evidence for his claims.
He said that EU countries should only use 5G equipment from Nokia and Ericsson.
He claimed that using Huawei equipment would put the NATO alliance.
“Untrusted, high-risk vendors like Huawei and ZTE [Corporation, another Chinese 5G equipment vendor] provide the CCP’s authoritarian government the capacity to disrupt or weaponise critical applications in infrastructure or provide technological advances to China’s military forces,” Krach said.
Washington has campaigned for more than two years to try and push countries it considers allies to avoid using 5G equipment from Huawei in their networks. Thus far, Australia and Vietnam have said openly that they would follow the US' lead.
Japan, South Korea, New Zealand and Poland have indicated that they are likely to toe the US line, but have yet to make public pronouncements about what policy they would follow.
The UK broke ranks with the US in January, saying it would allow Huawei to supply up to a third of equipment for non-core parts of its 5G networks but more recently changed its stance, saying it would remove Huawei gear completely by 2027.