The German government has said it “will not be intimidated” by Russian attempts to undermine the country’s support of Ukraine, but refused to comment on a report that Moscow planned to assassinate the chief executive of a leading defence company.

CNN reported that American intelligence discovered earlier this year that Russia planned to kill Rheinmetall chief executive Armin Papperger.

The report said the US informed Germany, whose security services were able to protect Mr Papperger and foil the plot.

Rheinmetall is a major supplier of military technology and artillery rounds for Ukraine.

Neither Rheinmetall nor the German government would comment on the report.

German interior ministry spokesperson Maximilian Kall said his ministry cannot comment on “individual threat situations”, but added that more broadly “we take the significantly increased threat from Russian aggression very seriously”.

A police vehicle is parked in front of the Rheinmetall AG headquarters in Duesseldorf
Authorities were able to thwart the plot, according to reports (dpa via AP)

Mr Kall added: “We know that (Russian President Vladimir) Putin’s regime wants above all to undermine our support for Ukraine in its defence against the Russian war of aggression, but the German government won’t be intimidated.”

He noted that German security measures have been increased significantly since 2022, and that “the threats range from espionage and sabotage, through cyber attacks, to state terrorism”.

In April, German investigators arrested two German-Russian men on suspicion of espionage, one of them accused of agreeing to carry out attacks on potential targets including US military facilities in hopes of sabotaging aid for Ukraine.

Germany has become the second-biggest supplier of weapons to Ukraine after the United States since Russia started its full-scale invasion of Ukraine more than two years ago.

CNN reported that the alleged Papperger plot was one of a series of Russian plans to kill defence industry executives across Europe supporting the Ukrainian war effort.

Kremlin spokesperson Dmitry Peskov dismissed the report. “All of this is again presented in the fake style, so such reports cannot be taken seriously,” he told reporters on Friday.