The US should not let Russian President Vladimir Putin “drive a wedge between friends and NATO”, Secretary of State Mike Pompeo warned on Monday.
The politician made the remarks alongside Hungarian Foreign Minister Péter Szijjártó in Budapest.
Pompeo also said the US had been absent from central Europe for too long, which he described as unacceptable.
Speaking on the political crisis in Ukraine, Pompeo urged Hungary to support the country in its quest for independence.
Hungary depends on Russia for its energy and benefits from Chinese investment.
Ahead of the press conference, Pompeo warned about the expansion of Huawei Technologies in Europe. The US alleges the telco is using spyware in its equipment. Huawei denies the allegations.
Pompeo will also visit Slovakia and Poland this week.
Click on the player above to watch Pompeo's comments.