Two men will remain behind bars, charged with importation offences, after 384kg of cocaine was found hidden in an excavator.
It is the biggest drug interception co-ordinated by ACT police.
The men were charged after a joint operation - involving NSW, federal and ACT officers along with those from Australian Border Force.
A statement from the law enforcement agencies on Monday said two Queanbeyan men aged 33 and 34 were arrested at a Bungendore business on Sunday.
