PARIS - Hundreds of hooded protesters held up an annual May Day demonstration in eastern Paris on Tuesday, with some smashing the windows of a McDonald’s restaurant and hurling petrol bombs inside. French police warned on Monday of possible clashes with far-left anarchist groups, known as Black Blocs, after a call on social media for a “Revolutionary Day”. Authorities said some 1,200 hooded and masked protesters had turned up on the sidelines of Tuesday’s planned demonstration by labor unions. Images also showed the smashed windows of a Renault garage on a road near the Austerlitz station and a construction vehicle...