Hazari

The Hazari are a species from the Delta Quadrant, known for being efficient bounty hunters.

In 2375, Kurros hired several Hazari to attack the USS Voyager. The Voyager crew were able to convince the Hazari to go after Kurros and his associates and the Hazari began to attack Kurros' starship. 

Later in the year, the Hazari captured Kathryn Janeway. (SS VOY (The Secret Heart of Zolaluz))