A murder investigation has begun after two women died after a reported stabbing incident at a block of flats.
Police said it happened in Santa Cruz Avenue, Bletchley, in Milton Keynes at about 18:36 GMT on Christmas Day.
The women, aged 38 and 24, both died at the scene and a teenage boy and a man in his late 20s were taken to hospital with serious injuries.
Thames Valley Police said a 49-year-old man from Milton Keynes was arrested on suspicion of murder and attempted murder, and remained in police custody.