The sinking of a Russian cargo ship that was sent to Syria to collect weapons was an "act of terrorism", the vessel's owner says.

The ship sank in the Mediterranean Sea between Spain and Algeria following an explosion in the engine room, officials said.

A Russian cargo ship sank in the Mediterranean Sea on Monday leaving two of the 16 crew members unaccounted for according to the country’s authorities. Fourteen of the crewmen were rescued and taken to a Spanish port after the crash,