Police were questioning three men today in the hunt to find the murderer of a teenager who was stabbed to death at home in front of his parents.
Aamir Siddiqi, 17, of Roath, Cardiff, south Wales, was murdered at home by two masked attackers on Sunday afternoon.
Police arrested two men aged 39 and 35 in the Roath area of Cardiff on Wednesday.
Yesterday they arrested a third man on suspicion of murder and attempted murder of the teenager's parents.
"South Wales Police investigating the murder of 17-year-old Aamir Siddiqi have this afternoon arrested a third man," a spokesman said yesterday.
"The 36 year old was arrested in the Richmond Road area of Roath, Cardiff, at around 12.20pm on suspicion of murder and the attempted murder of Aamir's parents."
Detectives believe the A-level student who was due to go to university in the autumn may have been the victim of mistaken identity.
His parents, aged 55 and 68, suffered serious stab wounds as they came to their son's aid and tried to fight off the two men.
Both were taken to hospital for treatment before being released on Sunday.
Senior investigating officer, Detective Chief Superintendent Stuart McKenzie said despite progress any witnesses are still urged to come forward.
"We continue to make significant progress in this investigation but despite this progress, and the third arrest, we are still very much appealing for information.
"There are still people out there with information on this brutal murder and my message to them is simple - please come forward for Aamir, for his family and to ensure justice is done."