- North Korea says it tested underwater nuclear attack droneThe Hill
- North Korea claims to test underwater nuclear-capable drone after US, South Korea and Japan show off naval mightCNN
- North Korea claims it tested underwater nuclear attack droneCBS News
- N Korea conducts ‘underwater nuclear weapons system’ test – state mediaBBC.com
- North Korea says tests underwater nuclear drone, criticises US-led joint drills | WIONWION