Three people are being questioned over the tiger kidnap of a bank official's husband and their two young children.
Two men and a woman were arrested in the Crumlin area of Dublin by detectives investigating the family's ordeal.
A car was also seized as part of the investigation.
Masked men forced their way into the terrified family's home in Johnsbridge, Lucan, west Dublin, in the early hours of October 23 last year.
The husband and children - a boy aged six and a girl aged three - were tied up and held overnight before being bundled into a van and driven off
The mother, who works for Bank of Ireland in Inchicore, was forced to drive to her workplace and take a substantial amount of cash.
She left the money in a four-wheel drive vehicle at nearby Liffey Gaels GAA club while her husband and children managed to free themselves.
They were found unharmed at Toghers Industrial Estate outside Naas, Co Kildare.
Two of the suspects, a 41-year-old man and a woman aged 37, were taken to Lucan and Ronanstown garda stations where they can be held for up to seven days under Section 50 of the Criminal Justice Act.
A 19-year-old man is being detained under Section 30 of the Offences Against the State Act at Lucan and can be held for a maximum of three days.