Two men are still being questioned by detectives investigating the £26.5m Northern Bank robbery in Belfast.
Millions were taken from the vaults of the Northern Bank last December
The robbery took place at the bank's Northern Ireland headquarters at Donegall Square West in the city on 20 December last year.
On Friday, Dominic McEvoy, 23, of Mullandra Park, Kilcoo, County Down, was remanded in custody accused of involvement in the robbery.
A 40-year-old man arrested on Thursday was released unconditionally on Friday.
Some money seized in County Cork last February was linked to the robbery, but virtually all of the missing millions remain unrecovered.