Gardaí have released a woman and two teenagers they had been questioning in connection with the death of a German student in Dublin on Saturday morning.

Three people, including a 16-year-old were questioned by gardaí after a German man was stabbed to death and his friend seriously injured in Dublin city on Saturday morning.

Gardaí are continuing to question two teenagers in connection with the murder of a 22-year-old German student in Dublin.

Two teenagers have been arrested by Gardaí in Dublin investigating the killing of a man in Rialto this morning.

Gardaí in Dublin investigating the killing of a man in Rialto this morning have arrested a teenager.