The men, aged 19 to 23, were caught carrying over 5,000 suspect counterfeit fentanyl-laced Percocet pills, the Prince William County Police Department said on Twitter.
Walter Alexander Quintanilla Gomez, Emerson Giovanni Quintanilla Gomez, Joel Medina and Zion Alexander Ryan were also carrying several firearms, police added.
Each individual is facing several charges including possession with intent to distribute an illegal narcotic.
Click here to follow Daily Voice Gaithersburg and receive free news updates.