A number of people have been arrested at the Port Tunnel in Dublin, after they failed roadside drug tests.
A checkpoint was carried out at the tunnel as part of 'Operation Daylight' by Gardaí.
It involved Dublin Metropolitan Region (Roads Policing) and DMR North Central Roads Policing Units.
'Operation Daylight' is a multi-agency initiative involving An Garda Síochána, Transport Infrastructure Ireland and Egis Port Tunnel operators.
It targets persistent offenders for driving dangerously - such as speeding, tailgating and deliberately evading payment of tolls - in the tunnel and on the motorway network.
On Thursday, three drivers were arrested for dangerous driving, and subsequently tested at the roadside for drugs and alcohol.
All three of them tested positive for drugs - two for cannabis and one for cocaine.
Image: Facebook/An Garda SíochánaA fourth motorist managed to evade the checkpoint, having crashed into the toll barrier to evade payment.
He and was stopped on the East Wall Road, where he was arrested for dangerous driving.
All four of the drivers have since appeared before Dublin District Courts, charged with offences under the Road Traffic Acts.
Gardaí have said the operation is ongoing.
