Dozens arrested in Paris protest against new security law

A riot police officer detain a protester during the demonstration in Paris (Lewis Joly/AP)

Police in Paris have arrested dozens of people during a tense and ill-tempered demonstration against a proposed security law, with officers wading into the crowds of several thousand to haul away suspected trouble-makers.

Officers targeted protesters they feared might gather in violent groups, like those who vandalised shops and vehicles at previous demonstrations.