The cause of death of Bobbi Kristina Brown – singer Whitney Houston’s daughter – has been determined, but officials say they will not reveal the post-mortem results.

They say a court in the US state of Georgia ordered a medical examiner to seal the results.

Bobbi Kristina, 22, died at a hospice on 26 July, six months after she was found unresponsive in a bath in her Atlanta flat.

In a statement, the Fulton county medical examiner said Bobbi Kristina’s post-mortem results would not be publicly released on the order of the Fulton county superior court.