Officers arrested a 27-year-old man on suspicion of murder and a 25-year-old woman on suspicion of attempted murder.
The pair were stopped and arrested by officers at around 4pm on the A12.
The arrests come as police are now able to identify a man who died after being shot during the incident in Wickford as 45-year-old Hugh Doherty.
Mr Doherty was shot at about 9.45pm on Sunday April 16 at Cranfield Park Avenue, Wickford. He was taken to hospital but sadly died from his injuries.
A post mortem examination has now been carried out which found Mr Doherty of Cranfield Park Avenue, Wickford died as a result of a gunshot wound to the chest.
A 35-year-old woman, who suffered multiple stab wounds during the incident, remains in hospital in a serious but stable condition.
Anyone with information can contact the Brentwood Major Investigation Team on 101 or email email@example.com. Alternatively contact Crimestoppers anonymously on 0800 555 111.
The 27-year-old man and 25-year-old woman both remain in custody where they are being questioned.