PARIS: Climate activists have reacted with dismay to the French government's decision to ban two scheduled mass marches across Paris and other French cities during crucial global climate change talks later this month.

Paris has extended a ban on public gatherings introduced after the terror attacks in the French capital until Nov. 30, the start of UN climate talks, the city's police headquarters said Saturday.

The Nov. 29-Dec. 12 marches were to be the main vectors for public participation in the talks, which will bring nearly 200 world leaders and tens of thousands of activists and others to Paris in hopes of agreeing on measures to limit global warming.

Climate activist Eros Sana of 350.org criticized the "contradiction" of the government banning the marches while encouraging Parisians to visiting cafes, restaurants and movie theaters. In a statement the prefecture recalled the "extreme seriousness" of last week's attacks, which left 130 people dead and prompted the government to put in place a three-month state of emergency.

Authorities have already banned two citizens' rallies planned around the climate summit that will be attended by 138 heads of state and government after the worst-ever terror attack on French soil.

The French government has said it will not "give in" to terrorism and insists the long-anticipated conference will go ahead.

A state of emergency put in place immediately after the Nov. 13 attacks was this week extended to three months.

It allows government to place under house arrest anyone considered to be a threat to security, and police to launch raids without advance authorisation from the courts.

Hundreds of such raids have taken place this week, turning up weapons arsenals in people's homes, a rocket-launcher in one case, and the flag of the Islamic State group which claimed the attack.

While the state of emergency does not allow control of the press, the interior ministry reserves the right to block websites or social media accounts promoting terrorism.

It also allows authorities to dissolve groups or associations participating in, facilitating or inciting acts which threaten public safety.