A force says it is still investigating the incident and anyone with information should get in touch.
Drivers are told to find alternative routes by police.
The crash happened shortly before 07:30 local time on the R192 in County Cavan.
Investigators have discovered 58 kilograms of cocaine with a street value estimated to be around €4. 6 million ($5.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results