Residents in Del Mar C saw federal authorities swarm their block this afternoon as undercover officers from the D.E.A., U.S. Marshals and the Laredo Police Department made a huge bust. The incident happened this afternoon in the 400 block of Plymouth. Undercover officers were outside this home to serve a warrant for a probation violation. A K-9 from the Laredo Police Department was brought in to check the home, and the dog alerted them to drugs inside the house. Authorities were able to find a large amount of cocaine. One man was arrested in this case, and a woman was taken into custody. The case is under investigation by the D.E.A.