A Belgian telecom giant that was cyberattacked last week brought eyes to Europe in the latest round of virtual warfare. According to documents leaked by Edward Snowden, the British spy agency is to blame.

Documents from the archive of whistleblower Edward Snowden indicate that Britain’s GCHQ intelligence service was behind a cyber attack against Belgacom, a partly state-owned Belgian telecoms company. A “top secret” Government Communications Headquarters (GCHQ) presentation seen by SPIEGEL indicate that the goal of project, conducted under the codename “Operation Socialist,” was “to enable better exploitation of Belgacom” and to improve understanding of the provider’s infrastructure.