Pope Francis on Saturday called for a "sincere dialogue" between Christians and Muslims as he met grieving relatives and survivors of France's Bastille Day attack, in which a jihadist ploughed his truck into a crowd.
Gunmen attacked a busy shopping mall in the German city of Munich on Friday evening, spraying bullets as people fled in horror for safety from what police said was a terrorist attack.
French President Francois Hollande defended his government from accusations it relaxed its anti-terror defences after the Euro championships, announcing further support for the fight against the Islamic State group.
When a person craving violence is drawn in by Islamic State ideology offering them glory and a sense of belonging, it provides a volatile mix that can lead to the kind of massacre seen in the south of France last week, experts say.
Links between the Nice truck attacker and "terrorist networks", including the Islamic State group which has claimed the killings, "have not yet been established by the investigation", France's interior minister said Monday.
The man behind the truck attack that killed at least 84 people celebrating Bastille Day in the French city of Nice had recently been radicalised, French Prime Minister Manuel Valls said in remarks published on Sunday.
Police arrested a man and a woman in the French city of Nice on Sunday morning in connection with the truck attack that killed at least 84 people celebrating Bastille Day, a judiciary source said.
The Islamic State group claimed responsibility Saturday for the truck massacre in Nice, as France highlighted the "extreme difficulty" of preventing such attacks amid tough questions over security failures.
The 31-year-old Tunisian who killed 84 people by driving a truck through a Bastille Day crowd in Nice on Thursday spent years seeing psychologists before leaving Tunisia for France in 2005, his sister said.
French authorities were trying to determine on Friday whether a Tunisian who killed at least 84 people by ploughing a truck into Bastille Day crowds had acted alone or with accomplices, but said the attack bore the hallmarks of Islamist militants.
Middle East states and leading Muslim clerics united Friday in condemning a truck attack that killed at least 84 revellers in the French resort of Nice, calling for a joint struggle against extremism.
An attacker who drove a heavy truck into crowds in the French city of Nice killing at least 84 people came from the Tunisian town of Msaken which he last visited four years ago, Tunisian security sources said on Friday.
