US whistleblower Edward Snowden | Berit Roald/AFP via Getty Images WikiLeaks releases secret German intelligence data Data dump is related to government inquiry into Edward Snowden’s NSA revelations.

WikiLeaks on Thursday released 90 gigabytes of information linked to Germany's parliamentary inquiry into the activities of its foreign intelligence agency and cooperation with U.S. intelligence counterparts.

According to a WikiLeaks statement, the leaked data included 2,420 documents from government agencies including the Federal Intelligence Service and the Federal Office for the Protection of the Constitution.

The information related to a 2014 inquiry, launched in response to revelations by whistleblower Edward Snowden that the U.S. National Security Agency had spied on top German officials and partnered with intelligence services across the world, including Berlin's.

"This substantial body of evidence proves that the inquiry has been using documents from Mr Snowden and yet it has been too cowardly to permit him to testify," founder Julian Assange said in the WikiLeaks statement. "Germany can not take a leadership role within the EU if its own parliamentary processes are subservient to the wishes of a non-EU state."

The most confidential documents related to the inquiry were not digitized and therefore not included in the leak, German newspaper Die Zeit reported.