A woman found dead in the grounds of an east London Baptist church suffered fatal head injuries.
The victim, who has been named as 41-year-old Kelly Stewart, died at the scene in Barking Road, Plaistow, on Thursday.
Officers were called to the Memorial Community Church at around 3.10pm. Police believe she was attacked between 12.45am and 1.45am that day.
Detectives are keen to speak to anyone who was in contact with Kelly Stewart in the weeks before her death.
Kelly Stewart has no permanent address at the time of her death, but was from the Newham area.
Anyone with information is asked to call the incident room on 020 8345 1570 or call charity Crimestoppers anonymously on 0800 555111.