France will reinstate border controls for UN climate conference

Concern over potential terrorist attacks and violent protests in Paris leads interior minister to announce month-long restriction

France will reinstate controls on its borders - normally open to countries in Europe's free-travel zone - for the period around a UN climate conference in Paris, the interior minister has said.

Authorities are on alert for violent protesters as well as potential terrorist attacks around the conference, which takes place from 30 November to 11 December. Eighty heads of state, including President Barack Obama, and tens of thousands of other people are expected in Paris for the opening.