A Liberian flag-state accident investigation into the disappearance of a ship electrician while at sea on a Greek-controlled tanker has concluded he may have committed suicide.

As such, the incident on the 108,000-dwt Alexia (built 2009) could turn out to be another example of a growing suicide problem among ships' crew, which has recently raised industry concerns.

The 55-year-old electrical engineer was declared missing in September as the Alexia sailed from Malta to Russia, according to a recently released Liberian report.