The next terrorist attack on a major international convention in the French capital could be the deadliest in living memory.
On Friday, gunmen attacked the COP21 climate change conference in Paris.
It was the first time that the French government has been forced to cancel a major gathering of world leaders, as the terror threat has mounted.
“The next attack will be even more deadly, it is very likely to be the next mass shooting in France,” said Jean-Yves Le Drian, head of the Paris police, in a television interview.
“And the threat will grow exponentially.
We are very close to the first attack on the EU summit. “
There will be more attacks on the European continent.
Paris, which has suffered the worst terror attack on record, has been hit by several attacks in recent years, most recently in October 2015 when gunmen shot dead the former French president and his wife, Brigitte Trogneux.”
The Paris attacks have made us realise that we cannot let ourselves be complacent,” he added.
Paris, which has suffered the worst terror attack on record, has been hit by several attacks in recent years, most recently in October 2015 when gunmen shot dead the former French president and his wife, Brigitte Trogneux.
The French president has spoken of his “absolute horror” at the attack.
But he has been criticised for not doing enough to curb the risk.
“We must take steps to protect ourselves from this attack,” he said on Friday.
“In particular, we must take measures to stop these attacks in the first place.”
Paris Mayor Anne Hidalgo said it was “not too late” for the city to move forward and that the city would be able to “defeat terrorism” if necessary.
Paris has been rocked by a string of attacks in a short period of time, including a series of coordinated assaults in November 2015 and December 2015, which killed 130 people.
In June, the country’s most senior police officer said the threat from terrorism was “growing”.
France’s federal police chief, Christophe Castaner, has warned that Paris was “heading for a massacre” in the wake of the attack on Saturday.
“This is the first step toward a massacre.
This is the biggest terrorist attack in the modern history of France,” he told reporters.
“I think we will see a massacre.”
The attack is the latest in a string that has left hundreds dead in Paris since 2015, when the city’s Grand Palais was hit by a series the gunmen used automatic weapons to open fire, killing scores of people.
The attacks have sparked a global outpouring of grief and anger for France, which hosts a major UN climate change meeting on Sunday, in the capital’s historic Place de la Republique.
President Francois Hollande has called on the Paris government to act to prevent the next attack.
“If this attack will happen again, we will have to act,” he has said.
“And if it will happen in Paris, I am ready to give my life to defend Paris.”
A French police officer stands guard outside the Bataclan concert hall in Paris after gunmen attacked it on Friday (AFP)