A Venezuelan vet who surgically inserting bags of liquid heroin into puppies being transported to the US has been arrested.
Spanish police caught Andrés López Elorza (33) in the north-western town of Santa Comba following an extensive search after a Spanish court ruled he could be extradited to the United States to stand trial for drug trafficking.
The vet was a member of a drug-trafficking gang that used dogs to send liquid heroin from Colombia to the United States.
Police said Colombian authorities discovered 3kg of heroin implanted in three puppies during a 2005 raid on a clinic Mr López tan in Medellín, the second-largest city in Colombia.
He was arrested in Spain in 2013 but released while his extradition was being considered.