Belgium and the Netherlands are now investigating claims that Germany has helped the United States spy on their allies.

"If it should emerge that the reports of wide-scale eavesdropping by the German secret services are correct, Germany will have to provide an explanation," Belgium's Telecoms Minister Alexander de Croo said in a statement, according to the Azeri-Press Agency.

The issue has occupied German politics and media for weeks, as people are asking questions about who is involved in the alleged spying and how much Chancellor Angela Markel knew about the claims. Two parliamentary inquests are also in order.

The scandal has reached across Europe, and now many lawmakers are reporting how they have fallen victim to German spies.

"German authorities should cooperate with their European partners and not with the NSA. We have to change Germany's focus in terms of intelligence cooperation, we have to bring them back to Europe," Peter Pilz, an Austrian European MP from the Greens party told the Agence France-Presse.

Various media reports claim that the spying in Belgium was carried out through the monitoring of data carried through 15 cables, most of which were operated by national telecom giant Proximus, AFP reported.

Pilz claims to have proof that German telecommunications giant Deutsche Telecom also cooperated with the BND spy agency.