Over the past decade, out-of-state drug companies shipped 20.8 million prescription painkillers to two pharmacies four blocks apart in a Southern West Virginia town with 2,900 people, according to a congressional committee investigating the opioid crisis.

The House Energy and Commerce Committee cited the massive shipments of hydrocodone and oxycodone — two powerful painkillers — to the town of Williamson, in Mingo County, amid the panel’s inquiry into the role of drug distributors in the opioid epidemic.

“These numbers are outrageous, and we will get to the bottom of how this destruction was able to be unleashed across West Virginia,” said committee Chairman Greg Walden, R-Ore., and ranking member Frank Pallone Jr., D-N.J., in a joint statement.

The panel recently sent letters to regional drug wholesalers Miami-Luken and H.D. Smith, asking why the companies increased painkiller shipments and didn’t flag suspicious drug orders from pharmacies while overdose deaths were surging across West Virginia.

The letters outline high-volume shipments to pharmacies over consecutive days and huge spikes in pain pill numbers from year to year.