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RTS says Serge Enderlin and cameraman Jon Bjorgvinsson, covering the opening of Louvre museum, were held for 2 days
Louve Abu Dhabi first museum to bear name outside France
A source said that though Hamahmy sympathized with IS, he had not been given instructions by the group
Hamahmy was shot several times on Friday after attacking soldiers as he cried "Allahu Akbar"
Designed by French architect Jean Nouvel, the Louvre will feature 9,200 square metres of gallery space
The museum was originally scheduled to open in 2012 but that target was pushed back until this year