France: no signs truck attacker linked to extremist network

on the famed Promenade des Anglais in Nice, southern France, three days after a truck mowed through revelers, Sunday, July 17, 2016. French authorities detained two more people Sunday in the investigation into the Bastille Day truck attack on the Mediterranean city of Nice that killed at least 84 people, as authorities try to determine whether the slain attacker was a committed religious extremist or just a very angry man.(AP Photo/Francois Mori) (The Associated Press)

View of the famed Promenade des Anglais scene of the Thursday's attack in Nice, southern France, Sunday, July 17, 2016 three days after a truck mowed through revelers. French authorities detained two more people Sunday in the investigation into the Bastille Day truck attack on the Mediterranean city of Nice that killed at least 84 people, as authorities try to determine whether the slain attacker was a committed religious extremist or just a very angry man.(AP Photo/Francois Mori) (The Associated Press)

French soldiers patrol on the famed Promenade des Anglais in Nice, southern France, three days after a truck mowed through revelers, Sunday, July 17, 2016. French authorities detained two more people Sunday in the investigation into the Bastille Day truck attack on the Mediterranean city of Nice that killed at least 84 people, as authorities try to determine whether the slain attacker was a committed religious extremist or just a very angry man.(AP Photo/Francois Mori) (The Associated Press)

France's interior minister says investigators have no evidence so far that the truck driver who killed 84 people in Nice had links to "terrorist networks."

Bernard Cazeneuve said Monday on RTL radio that while the Islamic State group has claimed responsibility for the Bastille Day attack, the driver may have been motivated by IS messages but not necessarily coordinating with a larger network.

Cazeneuve says: "These links for now have not been established by the investigation."

Authorities say Mohamed Lahouaiej Bouhlel, a Tunisian living in Nice, had become recently and rapidly radicalized.

Cazeneuve said 59 people are still hospitalized after the attack Thursday, 29 of them in intensive care, out of 308 people injured overall. Many of the dead and injured were children watching a fireworks display with their families.