MUNICH: France's prime minister is warning that the terrorist threat is a long-term one and there will be other major attacks.

Manuel Valls told a group top defense officials and diplomats Saturday that after the two 2015 attacks in France, the world has "entered a new era."

He says "we are at war with terrorism; we need to be sincere with our people and we need to tell them there will be other attacks, major attacks — this is something we know for sure."

In addition to committing military power to fighting the Islamic State group, Valls said nations needed to fight the radicalisation of youth and work for peace in places such as Syria, telling Russian Prime Minister Dimitry Medvedev, "we need to stop bombing civilians."