How to Delete ALL NPC and NPC Vechiles?

I need to delete all NPC.
If I’m using this script, I still can see NPC.

trafficDensity = 0.0
pedDensity = 0.0
Citizen.CreateThread(function()
while true do
SetVehicleDensityMultiplierThisFrame(trafficDensity)
SetPedDensityMultiplierThisFrame(pedDensity)
SetRandomVehicleDensityMultiplierThisFrame(trafficDensity)
SetParkedVehicleDensityMultiplierThisFrame(trafficDensity)
SetScenarioPedDensityMultiplierThisFrame(pedDensity, pedDensity)

Citizen.Wait(0)
end

end)

What NPCs? You may also have to turn off certain scenarios

All NPC Peds, Vehicles and etc

try this