France is deploying additional police and troops to guard around 140 world leaders expected in the Paris region for critical talks on fighting global warming.
The country remains on high alert for possible terrorist attacks after Islamic extremists killed at least 130 people in a rock concert massacre, shootings at Paris cafés and suicide bombings at the national stadium on November 13.
Interior Minister Bernard Cazeneuve said that France will impose tight road traffic restrictions for the climate conference and maintain controls on its borders, which are normally open to other European countries - adding border checks would remain in place as long as the threat level remains high.
He said 120,000 police, gendarmes and soldiers are deployed across the country to assure France's security.
President Barack Obama is among the many leaders expected to arrive shortly for the UN climate talks that start next Monday.