Firefighters were called to the port of Southampton in the UK after chemicals leaked from a container.
The box was on board the 4,738-teu Japanese vessel Vecchio Bridge (built 2005), the Daily Echo reported.
No casualties were reported, but a cordon was put in place on Wednesday.
A spokesperson for DP World Southampton told the newspaper: “We can confirm that 14:20 a member of staff found a container to be leaking on board the vessel Vecchio Bridge.