(VOVworld) – On Monday US President Barack Obama and French President Francois Hollande visited the scene of the Bataclan theatre attack in Paris and laid flowers to commemorate the victims.

US President Barack Obama and French President Francois Hollande lay flowers on the shrine to terror victims. (Photo: mirror.co.uk)

Mayor Anne Hildago was also at the scene where 90 people were killed by Islamic extremists. Paris security was stepped up for the 21st Conference of Parties to the United Nations Framework Convention on Climate Change (COP21) which 150 world leaders are attending.