Detectives are investigating after a woman sustained critical injuries at an address in Edgware.
Police were called at around 1835hrs on Saturday, 21 March, to a critically injured woman at an address in Penniwell Close, Edgware.
Officers attended the location along with London Ambulance Service. A woman, aged in her 50s, was taken to hospital where her condition is critical.
A man has been arrested on suspicion of attempted murder. The man is known to the injured woman.
Anyone with information that may assist police is asked to call 101 reference 5353/mar21. To remain anonymous please contact Crimestoppers on 0800 555 111.