Federal and local authorities have uncovered what they allege was an illegal biological laboratory operating inside a Las Vegas home owned by a Chinese national.

Newly released footage from the Las Vegas Metropolitan Police Department shows a dramatic hazmat response as agents hauled bags of medical tubing, vials and containers filled with unknown liquids from the suburban property.

During a press briefing on Monday, LVMPD Sheriff Kevin McMahill revealed investigators discovered a ‘significant volume of material’ stored in refrigerators and freezers throughout the home, including vials and containers holding liquids of varying colors and compositions.

Read more: Discovery as cops raid suspected biolab in Las Vegas with thousands of vials