An American teen girl killed herself after bullies shared a nude video of her showering on Snapchat, her family have said.

Tovonna Holton, 15, was found dead by her mother on Sunday in their Florida home.

The teenager had recently been left devastated after her friends filmed her in the shower and posted the clip on social media app Snapchat.

Her mother Levon Holton-Teamer said her daughter had stolen her gun from her handbag before locking herself in the bathroom and shooting herself.