Two 18-year-old men were arrested on suspicion of murder in Luton this morning.
Detectives executed two warrants to arrest the teens in connection with the murder of Micah Urquhart, 19, who was stabbed to death on Friday.
Both men are now being questioned by police.
Detective Chief Inspector Sharn Basra, of the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit, said: “Although we have made arrests in connection with this investigation it is of paramount importance that people still come forward and assist this investigation.
“Detectives are continuing to piece together Micah’s last movements – we know he was last seen leaving his home address in Hastings Street at 3.30pm on Thursday afternoon (Sept 12) as he was heading on foot towards the town centre. It is important that anyone who saw or heard from him from 3.30pm on Thursday until 12.40am on Friday should contact the inquiry team as soon as possible.
“I would like to thank those people who have already come forward and spoken with officers, however, we know there were a number of people in the Hastings Street area who have still not come orward to speak with us.”
Police are looking for four men who were seen going into an alleway way which runs between two houses that have been converted into flats in Hastings Street.
All the group are described as wearing hooded tops; one is described as black and another is described as a white man with short straight ginger hair which was brushed forward.
Two other men were also seen on CCTV in the area at around the time of the incident. They are seen walking from Hastings Street towards Windsor Street.
These people may be vital witnesses.
Call the Major Crime Unit on 01707 355666, or Bedfordshire Police, in confidence, on 101, or text information to 07786 200011.