Two puppies have been seized by Revenue officers at Dublin Port.
The two eight-week-old Chihuahua cross puppies were found on Wednesday morning.
Officers stopped and questioned a man who was travelling to the UK.
The man did not have pet passports for the dogs, nor were the dogs microchipped - as is required under the Animal Health and Welfare Act.
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The puppies were transferred into the care of the DSPCA, where they are receiving veterinary attention.
Separately, approximately 1kg of herbal cannabis was seized as part of an intelligence-led operation in Waterford.
It followed a search under warrant of a property in Waterford city.
The illegal drugs have an estimated street value of €20,000.
The joint operation was conducted by Revenue's Customs Service, the Garda National Drugs and Organised Crime Bureau and the Waterford City Garda Drugs Unit.
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A 29-year-old Irish man was arrested by Gardaí and is currently being detained at Waterford City Garda station under Section 2 of the Criminal Justice Act
Investigations are ongoing following both operations.