Kayden Moy was found seriously injured on Irvine beach in North Ayrshire last month and died in hospital.
A third teenager has been charged in connection with the death of a 16-year-old following reports of a disturbance on a beach.
Kayden Moy, from East Kilbride, South Lanarkshire, was found seriously injured on Irvine beach in North Ayrshire after police were called to the area at about 6.45pm on May 17.
He was taken to Crosshouse Hospital in Kilmarnock where he died a short time later.
Police said on Wednesday a 14-year-old boy has been arrested and charged in connection with the death.
He is to appear in court in due course.
Two 17-year-old youths appeared in court on separate days last month charged with murder following the incident.
Neither entered a plea at that time.
