From the Express:
The President was speaking at the opening of the Paris-Bordeaux high-speed line at Villognon (Charente). His address was broken off when a gun was fired somewhere in the crowd.
Mr Hollande, who will step down as President in May, raised a hand as he paused to look over in the direction of the discharged weapon.
Seconds later, he carried on with his speech.
According to local media a security guard accidentally fired his weapon after leaving his safety off. Two people were injured.