A Liberia-flagged cargo ship transporting corn from a Russian port to Turkey is working to contain a water leak after sustaining a crack in the Sea of Azov earlier this week, Russia’s port agency reported.   The vessel, Pavel Grabovskiy, carrying 2,939 tons of corn, was en route to Turkey from the Russian port of Rostov when it alerted Russia's marine rescue center in Taman on Sunday. A crack had been discovered on the starboard side, leading to water ingress in the ballast tank, according to a statement from Rosmorport, Russia’s state agency for ports.   As of Thursday, water was being pumped out of the affected tank, and additional equipment was expected to be delivered to aid the process, the agency confirmed.   Rosmorport assured that there were no casualties, oil spills, or environmental pollution resulting from the incident.