Two more cargo vessels have been hit by mass poisoning events, following a fatal incident on a Precious Shipping bulker earlier in February.
Russian maritime and river transport agency Rosmorrechflot said one seafarer died and five others suffered symptoms on the 1,800-dwt general cargoship April (built 1981).
The vessel was in the Kerch strait at the time, according to the agency's press secretary, Alexei Kravchenko.
