Revelations that emerged in 2013 showed that the US intelligence agency had tapped the phones of several leaders – including Germany's Angela Merkel.
Now, a new multi-national media investigation says a Danish military intelligence unit supported the US wiretapping operation. Danish intelligence reportedly worked with the US National Security Agency from here - to eavesdrop on European politicians.
A joint investigation by several European media outlets shows former German chancellor candidate, Peer Steinbrück, was among the espionage targets.
A major problem is that the Danish government didn't inform their German neighbors, though they apparently knew about the eavesdropping as early as 2015. The German government said it only found out about the spying after press inquiries.
Spying on Chancellor Angela Merkel and former Foreign Minister Frank-Walter Steinmeier was revealed by NSA leaker Edward Snowden and a parliamentary inquiry. It did not reveal that a close European ally was involved.
The NSA, the Danish intelligence service and the Danish government refused to comment on the latest revelations.