| Clue | Source | Date |
|---|---|---|
| Group of stealthy attackers? | LA Times Daily | 03 May 2019 |
| Group of stealthy attackers? | The Washington Post | 03 May 2019 |
| Group of stealthy attackers? | ||
| Alliance of those who attack from hiding? | ||
| Group specializing in sneak attacks? | ||
| Group specializing in sneak attacks? |