FILE - The Jan. 20, 2011 file photo shows German Chancellor Angela Merkel using her mobile phone at the German Federal Parliament Bundestag in Berlin. The German Foreign Ministry said Thursday, Oct. 24, 2013 it has summoned the U.S. ambassador in the wake of allegations that American intelligence may have targeted Chancellor Angela Merkel's cellphone. AP Photo/Gero Breloer FILE - The Oct. 25, 2011 file photo shows German Chancellor Angela Merkel using the short message service of her cell phone at the chancellery in Berlin. AP Photo/Markus Schreiber BRUSSELS (AP) - German Chancellor Angela Merkel says that trust between the U.S. and its partners has to be restored following allegations that American intelligence targeted her cellphone. Merkel said she told President Barack Obama in a phone call that "spying among friends cannot be." She said there needs to be trust among allies and partners and "such trust now has to be built anew." Merkel spoke Thursday as she arrived at a summit of the European Union's 28 leaders. Merkel complained to Obama on Wednesday after receiving information her cellphone may have been monitored. The White House said the U.S. isn't monitoring and won't monitor Merkel's communications - but didn't address what might have happened in the past.