French tourist attractions were back open on Sunday after a lockdown imposed after the Paris terror attacks on November 13.
French President Francois Hollande announced a week of national mourning and the national police force (CNA) said it was mobilising more than 5,000 troops in response to the threat of attacks.
The national police said it had issued an alert to all schools, schools, colleges, universities, and all public places for the duration of the national mourning.
The security threat was assessed as low by the Paris-based threat intelligence unit (SIF), the Paris prosecutor’s office said.
French Prime Minister Manuel Valls tweeted: “We will continue our fight against terrorism until the end of our lives.”
“We are on alert, and our state will be vigilant,” he said.
A French soldier stands guard at the Arc de Triomphe in Paris, France, December 8, 2017.
France was hit by a series of attacks on Paris in November, killing 130 people.
Two of the attacks took place at Paris’ Notre Dame cathedral and the Bataclan concert hall, where gunmen killed 130 people in what became the deadliest terrorist attack on French soil since the Second World War.
The second attack in Paris killed 130 others at the Stade de France, the home of France’s national soccer team.
On Sunday, Hollande said the country would not “leave our families to suffer in the silence of terror”.
“We will remain vigilant, and we will continue to defend our values,” he added.
Hollande also warned that the country’s national guard would be deployed to protect the capital.
He added that “the threat of terrorism is real, and the state of emergency will remain in place until the threat is eliminated”.
Paris was once a vibrant and bustling metropolis that was home to the world’s most famous museums, the Eiffel Tower, the Louvre and the National Museum.
The capital was also home to many tourist attractions and cultural sites.