A National Transportation Safety Board report released Thursday says a failure to properly disconnect and secure vehicle batteries led to the 2020 fire aboard vehicle carrier Höegh Xiamen in Blount Island. The June 4th fire resulted in $40 million worth of damages and sent nine Jacksonville firefighters to the hospital. No one died in the explosion but some fighters were severely injured. None of the vessel’s 21 crew members were injured during the incident. It took firefighters more than a week to officially put the subsequent fire out. The NTSB issued eight safety recommendations to federal regulators and the companies involved in the accident as a result of the investigation. According to the report, the explosion happened because of a spark from a car battery on the ship. Additionally, the car batteries had not been disconnected and secured before the cargo ship left the dock.