An isolated cyberattack on the computer networks of Germany’s government has been contained and is being investigated.

Mixed reports, which the German Interior Ministry has not confirmed, suggest ties to the Russian hacker group APT28 (aka Fancy Bear), and that the group may have stolen data from the Foreign and Defence Ministries.

News of the incident comes as Germany’s Social Democrats are voting by postal ballot. Adding to the intrigue, Reuters reports, “Western governments and security experts have linked the hacking group known as APT28 or Fancy Bear to a Russian spy agency, and have blamed it for operations including an attack on the Democratic National Committee ahead of the 2016 U.S. elections and the German lower house of parliament in 2015.”

Read the full story at Reuters.