An intelligence document revealed that the Germany Ramstein airbase has been serving as the center of the US drone strikes in Africa and the Middle East.
Der Spiegel and The Intercept quoted an anonymous source as saying on Friday that the German government was aware of Washington's intentions.
According to the reports, the US regularly used drones from here to hit targets suspected of terrorism. The targets were situated in Africa, the Middle East, Pakistan and Afghanistan.
"Signals are transmitted from Ramstein, which tell the drones what they should do," Der Spiegel reported a US official as saying, on condition of anonymity.
The magazine also referred to documents which could put the German government under pressure, since Berlin had always argued that it had "no confirmed knowledge" on the central role of Ramstein in the drone attacks by the US.