Excerpt:
Germany launched a second investigation on Tuesday into suspected spying by Turkey and its interior minister said Berlin would not tolerate foreign espionage on its soil.
Tensions are running high between the two NATO allies ahead of a referendum in Turkey next month that proposes expanding the powers of President Tayyip Erdogan. Berlin infuriated Ankara by cancelling several campaign rallies by Turkish ministers on German soil, drawing accusations from Turkey of "Nazi" tactics.
Media reports of Turkish espionage targeting members of Germany's large ethnic Turkish diaspora have deepened the rift.