Prefectura Naval Argentina officers at an observation post detected two boats crossing from the Paraguayan coast to Argentina, each carrying two occupants and several bundles.[1] The four occupants fled toward the neighbouring country in one boat when they noticed the force, abandoning 28 bundles on the shore and nine more inside the second boat.[1]

Officers counted 1,179 wrappers of narcotics in total, a load weighing more than a ton.[1] The 37 bundles held 1,179 packs of pressed marijuana.[2] Authorities valued the load at more than 3,500 million pesos on the illegal market.[2]

The operation took place at Puerto Fontini on the Paraná River at kilometre 1,726 after intelligence indicated a possible drug entry from Paraguay.[1] The seizure of more than a ton of marijuana occurred in the Puerto Rico district at Puerto Fontini on the Paraná bank.[3] The Federal Court and Federal Prosecutor’s Office in Oberá took over the case and ordered seizure of the substance and further proceedings.[1] Investigators moved the drugs under strict security for forensic examination while working to identify those responsible.[2]