All five people arrested in connection with the disappearance and death of Limerick teenager Richard 'Happy' Kelly have been released from custody.
Four men and one woman were arrested in early morning raids on Tuesday in Limerick and questioned at Garda stations at Ennis, Killaloe and Shannon.
Richard Kelly, 17, disappeared from his home in the O'Malley Park area of Limerick in April of 2006.
His body was discovered last November at Lough Bridget in Co Clare.
It is believed the teenager died at the hands of a Limerick criminal gang.