Toddler twins have drowned in their family pool after their great-grandma, who is said to suffer from Alzheimer's, is believed to have left the back door open.
Locklyn and Loreli Callazzo were tragically found in the pool at their parents home in Oklahoma City, Oklahoma, US.
The two 18-month-old tots were discovered at the bottom of the pool by their mum Jenny Callazzo, 37, who was seen desperately administering CPR by city firefighters as they arrived at the scene.
