A man who was found in Westfield Road at 10.17pm suffering from a serious leg injury died at the scene.
The victim, who is yet to be formally identified, was pronounced dead at the scene in Westfield Road, Berkhamsted, on Friday night.
Officers were alerted by the ambulance service who then attended the incident immediately.
However within a short time after the man, believed to be an 18-year-old local man, was pronounced dead at the scene. On Facebook his name "Jordan" has been mentioned.
The death is being considered as suspicious by the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit who have started a murder investigation.
A cordon was set up in Westfield Road as scenes of crime investigators gathered evidence in the area.
UPDATE : Police have made Two Arrests
Detective Chief Inspector Mike Branston from the MCU said: “This is a fast moving investigation with a number of lines of enquiry which we are currently pursuing. I would appeal to anyone who knows anything about this incident to contact police as soon as possible.”
Paul Mitson, Chief Inspector for Dacorum, said: “I know this incident will come has as a shock to people in Berkhamsted. We are committed to finding out exactly what happened and residents may have seen a significant policing presence in the town today as we investigate the circumstances around this tragic death.
“We are increasing the number of officers on patrol in the area today and this evening. Please feel free to approach them if you have any concerns.”
On facebook many where leaving condolences for the family and friends.
"Such a lovely young man, always stopped to say ‘hello’ and was a pleasure to have known him, such a sad loss of an amazing young man! Thought are with you and your family Rosemary (who is the grandmother)"
Anyone with information is asked to contact police via the non-emergency number 101, quoting Operation Centas
Alternatively, you can contact the independent crime-fighting charity Crimestoppers anonymously on 0800 555 111