Bouchard Transportation has added three more insurance companies as defendants in its $21.5m lawsuit concerning a 2017 explosion aboard an articulated tug barge that killed two crewmembers.

The Morton Bouchard III-led company is pursuing XL Catlin Lloyd's Syndicate of London and US-based insurers XL Specialty Insurance and Navigators Insurance, according to papers filed in US District Court for the Southern District of New York.