Two people have been arrested as part of a garda investigation into the murder last week of 24-year-old Limerick man Danny Fitzgerald.
A man in his late 20s and a woman in her early 20s were arrested over the weekend under section 50 of the Criminal Justice Act.
Four people - one male and three females - were released without charge over the weekend and six people, five men and one woman, remain custody.
A total of ten people have been questioned in connection with the murder.
Mr Fitzgerald from Old Pallas, Co Limerick was shot dead last Tuesday night when a gunman opened fire at his uncle’s cottage in Cloughnadromin, Ballysimon, Co Limerick.
It is understood the killing may be linked to an arson attack on a vehicle the previous night which took place at a house in the area.
A number of the victim’s relatives were present at the time of the shooting but escaped unharmed when the gunman fired at least 10 shots.
Gardaí investigating the murder seized €80,000 of cocaine on Saturday during searches carried out in a field in the Ballysimon Road area.
In total, €440,000 worth of cocaine and heroin has now been recovered during searches taking place as part of the investigation into the murder of the 24-year-old.