ORF journalist Erich Möchel believes he has identified the listening station - located on top of the 140 metre high IZD tower in Vienna’s 22nd district - not far from the UN headquarters.
A series of photos that were leaked to the journalist show a hut on the roof that is enclosed by solid steel bars and monitored by ten cameras. It cannot be seen from the street.
Möchel writes that it looks like “a maintenance building” but speculates that there may be equipment in the hut that can monitor mobile networks.
He adds that together with the US Embassy in Vienna’s 9th district and the ‘NSA villa’ in Pötzleinsdorf which is also assumed to be a listening post, the NSA could be spying on the whole city - as far as Schwechat.
The US embassy declined to comment on the allegations, as did the Interior Ministry.