A 20-year-old man who was stabbed to death at a skate park has been named.

Mason Miller died and a 17-year-old boy suffered life-threatening injuries following the stabbing in Northampton on Wednesday afternoon.

The boy remains in hospital and a murder investigation has been launched into Mr Miller's death.

Police were called to the skate park in Ringway in the Briar Hill area of Northampton at about 3.30pm on Wednesday.

As part of the wider police investigation, two 15-year-old boys and a 14-year-old youth appeared before Northampton Magistrates Court on Saturday charged with violent disorder and possession of an offensive weapon.

They were granted conditional bail and placed into the care of the local authority.

Northamptonshire Police said in a statement that dozens of detectives, officers and staff had been carrying out house-to-house enquiries following the stabbing.

There is an increased police presence in the area, including high-visibility patrols intended to offer reassurance and support the community.

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Detective Inspector Matt Bly said that the case remained a "fast-moving investigation" in which a number of lines of inquiry were being pursued by detectives.

He said: "This remains a murder investigation, and our thoughts first and foremost remain with Mason's family at this difficult time.

"The family understandably are still trying to come to terms with Wednesday's tragic events and, as such, have asked for complete privacy at this time."

Police have urged anyone with information to come forward.