—“…he defended the way police had handled the violence, saying little could be done to stop trouble-makers from infiltrating the crowds.

“We can only detain a certain number of people who turn up like you or I in civilian clothing and then suddenly are dressed in black bloc outfits in the middle of the crowd,” he said.

“We cannot keep up, even with 21 police units mobilised against movements which all of a sudden appear on a scale we’ve never seen before.”

Radical leftist groups had issued a call on social media — both in French and English — for people to take part in a “revolutionary May 1″ on the 50th anniversary of the 1968 student and worker protests which nearly brought down the government of the day.”—-