German automotive and arms manufacturer Rheinmetall suffered a cyberattack on Friday, the company said. The attack hit Rheinmetall’s business unit that serves industrial customers, particularly in the automotive sector. The company’s defense division — which produces military vehicles, weapons, and ammunition — remained unaffected and continues to operate “reliably,” Rheinmetall’s spokesperson Oliver Hoffmann said in an email to Recorded Future News. Rheinmetall is currently investigating the extent of the damage and is in close contact with the relevant cybersecurity authorities, Hoffmann said. Although it is unclear who is behind the attack, the Russian hacktivist group Killnet posted a message on their Telegram channel last month urging its followers to launch a distributed denial-of-service attack against Rheinmetall. Rheinmetall confirmed that they observed a higher volume of traffic on their network but said that it did not impact the company’s IT infrastructure. The timing of the attack aligned with Rheinmetall’s talks of constructing a new tank factory in Ukraine. The war in Ukraine has turned Rheinmetall into one of Europe’s most important weapons suppliers, which makes it an attractive target for nation-state hackers.