US President Barack Obama could skip the Group of Seven (G7) June summit in Bavaria if the German government hands over a list of US spying targets to parliament, German tabloid Bild said citing its sources on Tuesday.

The two-day summit is scheduled to kick off on June 7 in Bavaria’s castle Elmau, less than 60 miles from the notorious Bad Aibling monitoring station used by US spying agency NSA to eavesdrop on EU firms and officials. Chancellor Angela Merkel’s Socialist coalition partners regard NSA snooping on EU targets as a violation of EU and German laws.

The Socialist Democrat (SPD) Secretary General Yasmin Fahimi told Bild on Tuesday they had given the chancellery until June 8 to disclose the lists of so-called selectors – email addresses and phone numbers – that the NSA passed on to its German colleagues in Bavaria. SPD chief Sigmar Gabriel said this was not an ultimatum, but added that he expected Merkel to comply.