Three more quizzed over Byrne death
Three people were being questioned over the knife murder of 19-year-old David Byrne after two men were detained in the latest raids.
A teenage boy arrested earlier in the week remained in custody on suspicion of causing the youth's death in Inchicore, Dublin last weekend.
A Garda spokesman said two suspects, aged in their 20s, were detained in west Dublin and taken in for questioning to Pearse Street and Harcourt Terrace Garda Stations under section 30 of the Offences Against the State Act.
Mr Byrne was chased by at least four teenagers and stabbed to death last Saturday night, shortly after he left home in nearby Drimnagh.
There have been a total of 10 arrests in the case.