Five people are in police cutody following several serious incidents in Herefordshire yesterday.
The four men and a woman were all arrested on suspicion of attempted murder.
Two men received stab wounds following separate incidents in Hereford.
The injured men remain in hospital with serious injuries, their conditions are described as very poorly.
West Mercia Police are liaising with colleagues in Cambridgeshire who are conducting a murder inquiry following the death of a man in Peterborough over the Easter weekend.