Two men were still being questioned tonight by detectives investigating the £26.5m (€39m) Northern Bank heist in Belfast.
The pair, aged 30 and 43, were held as part of planned raids that led to five arrests being made.
Building contractor Dominic McEvoy, 23, of Kilcoo, Co Down became the first man charged with last December’s robbery when he appeared before a magistrate in Belfast on Friday.
Two others, aged 40 and 25, have been released without charge.
Although some cash seized in Co Cork in February has been linked to the raid on the Northern’s HQ, nearly all of the money stolen has still to be traced.
Police chiefs on both sides of the border have blamed the IRA for the robbery.