The war between the families of Whitney Houston and Bobby Brown has escalated, after a US tabloid published photos of their daughter Bobbi Kristina on her deathbed.

Relatives have been pointing the finger at each other over who gave the shot to the National Enquirer.

The photos shows the 22-year-old in the final days of a medically-induced coma, six months after she was found unresponsive in a bathtub.