REUTERS

U.S. President Barack Obama, his French counterpart Francois Hollande, British Prime Minister David Cameron, his counterparts Matteo Renzi of Italy, Stephen Harper of Canada and Shinzō Abe of Japan have gathered for the summit at German Chancellor Angela Merkel's invitation, according to Russian news agency TASS.

The EU is represented by President of the European Commission Jean-Claude Juncker and President of the European Council Donald Tusk.

Speaking ahead of the G7 Summit, President Obama said that counteracting Russian aggression in Ukraine would be one of the event's major subjects.

He also said that the participants in the summit would discuss issues related to the world economy, maintaining strength and prosperity of the European Union, the expansion of cooperation in transatlantic trade, and the prevention of threats, ranging from extremism to climate change.

REUTERS