4 Cops wounded as May Day rally in Paris turns violent

Violence erupted on the sidelines of May Day rally in Paris, leaving four policemen wounded including two suffering serious injuries, Interior Ministry said on Monday.

"During the clashes, four police officers were wounded ... one of them was seriously injured by hand and another seriously burnt in the face," the ministry said in a statement.

Interior Minister Matthias Fekl has firmly condemned "intolerable violence against police officers," pledging to do everything to identify and arrest the individuals who threw projectile and Molotov cocktails at riot police.

In a context of high terror risk, 9,000 policemen, gendarmes and soldiers were mobilized on Monday with 2,000 of them deployed to secure protests in the French capital, according to Paris prefecture.

One person was arrested after 150 masked people attacked riot police, who replied by using tear gas, local media reported.