Gardaí have arrested a "juvenile male" as part of the investigation into the murder of teenager Anastasia Kreigel in Lucan in Dublin in May.
He is due to appear before the Children's Court later this morning.
A 13-year-old boy has already been charged with murder after Ana's body was found at a disused farmhouse, three days after she was reported missing by her parents.
This morning another 13-year-old boy was arrested, and Gardaí are appealing for media sensitivity due to the nature of the case and the age of those involved.
She was reported missing just hours after she was last seen at St Catherine's Park close to her home on Monday, May 14.
Three days later her body was found on the Clonee road in Lucan.