Paris police: 21 people detained before protests
Paris police say 21 people have been detained in the French capital before protests by the "yellow vests" movement.
Thousands of police and other members of the security forces have been deployed in Paris for the fifth straight weekend of demonstrations and the government has called for calm after previous protests turned violent.
The "yellow vest" movement, which takes its name from the fluorescent safety vests French motorists must all have in their vehicles, emerged in mid-November as a protest against fuel tax increases.
