asked whether he could confirm the attacker's motives were linked to jihadism he replied: "No". 16–17 July On 16 July French Defence Minister Jean-Yves Le Drian said: "I remind you that Daesh's ideologue, Abu Muhammad al-Adnani, has for several weeks repeated calls to attack directly, even individually, Frenchmen, in particular, or Americans, wherever they are, by any means necessary ... It is murder, and Daesh's claim of responsibility comes later, as has happened in other recent events". Bernard Cazeneuve on 16 July, after ISIL had claimed the attacker as one of its soldiers, said: if Lahouaiej-Bouhlel was radicalised, "It seems that he was radicalised very quickly — in any case these are the elements that have come up from the testimony of the people around him." Cazeneuve on 16 or 17 July announced plans to increase security in response to the attack by calling 12,000 police reservists to add to the 120,000 person force. He urged "all patriotic citizens" to join the reserve forces to boost security following the attacks. 18 July and later On 18 July, France observed a one-minute silence in remembrance of those killed in the attack. In Nice, as the Prime Minister arrived to observe the silence, the crowd booed him and some shouted for his resignation, with some calling him a murderer. President Hollande was similarly booed by crowds when visiting Nice the day after the attack. The booing was described by BBC as "unprecedented", who commented that it was "a stark warning of how the mood in the country has changed" in comparison to public responses after other recent major terrorist attacks in France. On 21 July, the state of emergency was formally extended until 31 January 2017. A week after the attack, the anti-terror directorate of the National Police (SDAT) requested that the local authorities in Nice destroy CCTV footage of the attack, arguing that leaked images would compromise the dignity of victims and could be used as propaganda by terrorist organizations. The request has been refused by local authorities who have argued that the CCTV footage might provide evidence that the National Police had placed inadequate security measures on the Promenade des Anglais on 14 July. On 26 July 2016, three Nice residents who had chased the truck during the attack were presented with medals for bravery by the local authorities in Nice. On 14 July 2017, president Macron said during a