In the latest U.S. threat to Germany over use of Huawei 5G technology, U.S. Secretary of State Mike Pompeo issued a warning on Friday, saying that it was risky to allow the Chinese telecom firm to build infrastructure for 5G high-speed data networks.
A United States official said that Pompeo would address Huawei and say that allies' choices on telecom networks have "a direct bearing on our mutual national security".
Pompeo's visit had been scheduled earlier this month, but was called off at the last minute as tensions rose over Iran, on whose nuclear programme Berlin and Washington do not see eye to eye.
Germany will be the first stop in a four-nation tour of Europe in which Pompeo will also visit Switzerland and the Netherlands before joining Trump on his state visit to Britain.
Pompeo said he hoped that Germany would "follow Britain's example" and ban Hezbollah.
He stressed that many conflicts in the world could be resolved only by combined efforts of the United States and Europe. Berlin sent an envoy to Iran last week in an attempt to save the 2015 Iran nuclear deal, which Trump pulled out of in May 2018.
"We have many issues to discuss, since the world is not at rest", she added, mentioning the challenge of preventing Iran from acquiring nuclear weapons and hindering Iran's "aggressive actions".
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The stock market's tumble on Friday all but guarantees that May will be the first monthly loss for the market in 2019. No formal talks are now scheduled between the U.S. and China after the collapse of discussions in early May.
Trump said on Monday he was hopeful Iran would come to the negotiating table, but Supreme Leader Ayatollah Ali Khamenei said on Wednesday Tehran would not negotiate with Washington even after President Hassan Rouhani signalled talks might be possible if sanctions were lifted.
In a meeting with reporters, prior to his scheduled to trip to Europe, Pompeo said the US and China share overlapping interests when it comes to dialogue on the North.
According to the U.S. State Department, Pompeo made the comment Thursday in response to a question about whether their clash of opinions over sanctions on Huawei and trade disputes makes it hard to secure China's cooperation in regards to North Korea denuclearization efforts.
Merkel said that despite the differences between the United States and Germany the two sides agree that Iran must be prevented from taking "aggressive actions" and said the worldwide community must ensure that Iran does not have nuclear weapons.
The German Foreign Ministry said on its website: "Germany and the US agree: For the security of the region, it is crucial that Iran does not come into possession of nuclear weapons".
The aides said they had no confirmation or definitive information.