Gardaí are examining phone records relating to the teenagers killed in Easter Monday's horror road crash in Co Galway.
They are probing whether or not a dangerous 'car dare trend' from social media was involved in the fatal incident which claimed the lives on Kirsty Bohan and Lukas Joyce, both aged 14.
Gardai are continuing to investigate the incident as it is not clear yet how the four teenagers got access to the car and how the collision occurred.
