No suspects have been found after a 15-year-old was stabbed unprovoked in a Watford park, police have confirmed.

Almost a month after the attack left a teenager needing extensive surgery for stab wounds, the force confirmed no arrests have been made and the victim is continuing to receive treatment.

The 15-year-old was found injured in Cassiobury Park at around 5.45pm on April 28.

He had been rushed to hospital by the ambulance service while Hertfordshire Constabulary scoured the area to find the attacker.

Police launched an appeal after he evaded the search, describing him as white, 5ft 10ins, around 17 years old, wearing a black puffer jacket and carrying a Flannels branded bag.

As they appealed information on May 4, police asked witnesses to the attack or the events leading up to it to get in touch.

Anyone with information can email vishal.khanna@herts.police.uk or call 101 quoting crime reference 41/34268/23.