The European Union is putting under the microscope the rollout of new, high-speed mobile networking technologies known as 5G in a move that could affect the technology’s dominant company — Huawei.

Regulators focused on specific security threats linked to technology providers headquartered in countries with “no democratic and legal restrictions in place,” according to a report in The Wall Street Journal.

The news follows the release of a public report from the European Union that enumerated a number of challenges with 5G technology.

Heightened scrutiny of 5G implementation on European shores actually began back in March as member states wrestled with how to address American pressure to block Huawei from building out new telecommunications infrastructure on the continent.

The report from earlier in the week identified three security concerns that relate to the reliance on vendors linked to technology coming from individual suppliers — especially if that supplier represents a high degree of risk given its relationship to the government in its native country.

The new, private assessment reviewed by the WSJ is raising particular concerns about Huawei, according to the latest report.