Three seafarers have been killed by toxic gas on a Caronte & Tourist ro-pax in Italy.
Another crewman is in a critical condition after the incident on Tuesday on the 11,000-gt Sansovino (built 1989) in the port of Messina.
Local media said a tank was being cleaned by five men at the time.
An investigation has begun into the accident.
Caronte said: "It is with great pain that we learn the news of the death of three workers and the wounding of another seafarer on board the ship Sansovino.
“We want to express closeness to the families of those involved in the incident and make all possible cooperation to ensure that the sequence of events is clarified.”
