BERLIN (AP) — The head of Germany's national cybersecurity agency has been dismissed following reports of possible ties to Russian intelligence, the Interior Ministry said Tuesday.

The ministry said that Interior Minister Nancy Faeser dismissed Arne Schoenbohm as head of the BSI agency, German news agency dpa reported.

Schoenbohm co-founded a cybersecurity group a decade ago that brings together experts from public institutions and the private sector. German media have reported that one of its members is a company founded by a former Russian intelligence agent.

The German government said over a week ago that it was investigating the reports comprehensively.

There is growing concern in Germany that the country’s critical infrastructure might be targeted by Russia because of Berlin’s support for Ukraine.