BRUSSELS, Oct. 24 (Xinhua) -- Top leaders of the European Union (EU) gathered in Brussels on Thursday for a two-day summit that is likely to be dominated by the alleged U.S. spying on its allies.
Although the summit was originally scheduled to focus on digital economy, growth and jobs, as well as the economic and monetary union, many EU leaders from the 28 member states expressed anger over the fresh U.S. spying scandals upon arrival.
German Chancellor Angela Merkel said the alleged U.S. spying on her mobile phone communications was "unacceptable." She had told U.S. President Barack Obama that trust among allies would need to be rebuilt in a phone call on the eve of the summit.
Earlier on Thursday, the German Foreign Ministry summoned the U.S. ambassador as German politicians voiced their outrage over the allegations, which were denied by the White House.
This week, French President Francois Hollande also asked for an explanation from Obama, following allegations of U.S. spying on millions of French phones.
The latest spying scandals come months after European media reported, based on the information leaked by Edward Snowden, that the U.S. national security agency had bugged EU offices.
European Council President Herman Van Rompuy insisted on Thursday that the summit would still discuss economic and social issues, adding that growth could return to most EU member states in the coming year.
But the summit's planned topics could be further overshadowed by immigration concerns in the aftermath of a shipwreck off an Italian island, while British Prime Minister David Cameron also urged EU institutions to cut red tape on business.