Completely turn off Wi-Fi and Bluetooth

Is it possible to completely turn off the Wi-Fi and Bluetooth module on a Raspberry Pi 3 Model B running OSMC? If so, how?

The OSMC forum has a very efficient build in search function

https://discourse.osmc.tv/search?q=disable%20bluetooth%20pi3
https://discourse.osmc.tv/search?q=disable%20wlan%20pi3