Dyfed-Powys Police arrested 25 people following roads policing operation across Carmarthenshire and Powys over the weekend.
Detectives say the purpose of operation was to tackle acquisitive crime and reduce the impact which travelling criminals have across the force area.
Nine people were arrested for drink driving, nine for possession of drugs, two for driving while disqualified, two for carrying offensive weapons, one for aggravated vehicle taking, one for theft and one for a public order offence.
11 vehicles were seized because the drivers had no driving licence or no insurance, or both. Customs also dealt with two people for using red diesel.
“We had our own roads policing officers, together with colleagues from South Wales and Gwent roads policing units and special constables take part in this cross border operation,” said Inspector Mark Davies.
“The focus was acquisitive crime and in particular we wanted to reduce the impact which travelling criminals have on all forces, particularly on the borders with Powys and Carmarthenshire.
“It was also important to reassure people living in the communities which lie on our borders that we will deny criminals use of all our roads, not just those in the main urban areas.
“We targeted the main arterial routes into each force and the results show the operation was a success.
“Operations of this kind are regularly carried out by Dyfed Powys Police and we will continue to carry them out to make sure that criminals are not allowed unchallenged use of our roads.”