Authorities are investigating how bundles filled with hundreds of steroid vials became abandoned along the banks of the Rio Grande near Progreso.
U.S. Border Patrol agents told Action 4 News that the unsual seizure was made last week.
Agents were patroling the Rio Grande when they discovered seven bundles.
Investigators opened the bundles and found 466 vials of steroids and other stimulants worth $218,540 dollars inside.
It’s not clear how the drugs got there or who put them there.
Agents with the U.S. Drug Enforcement Administration (DEA) are continuing to investigate the case.