ST. LOUIS — Federal prosecutors say a man was caught this week traveling with more than 22 pounds of the synthetic opioid fentanyl in one of the largest seizures of the highly potent drug in Missouri.

Eighteen-year-old Daniel Cervantes Felix, of Maricopa, Arizona, has been charged with possession with intent to distribute fentanyl. No lawyer is listed for him in online court files.

A criminal complaint says investigators believe he was bringing the drug to New York when he was stopped Monday on Interstate 44.

U.S. Attorney Jeff Jensen said in a statement that it was the second largest seizure of fentanyl in the eastern half of the state.

"This amounts to millions of doses of fentanyl — enough to destroy or end the lives of hundreds of thousands of Missourians," he said.