Kherson border guards have registered a higher than usual presence of chemicals in the air, the press secretary of the State Border Service, Oleh Slobodyan, has said.
"Devices have shown an excess of chemicals (toxic industrial substances). Local government bodies, the State Emergencies Service and other law-enforcement agency have been informed accordingly," he said on Facebook.
There was a fallout of an unknown substance in Armyansk in the early hours of 24 August. On 28 August, Crimean head Serhiy Aksyonov said on Facebook about an extraordinary situation in Armyansk.
The occupying authorities attributed the fallout in northern Crimea to a long hot spell without precipitation. According to preliminary reports, it was caused by evaporation from an acid accumulator used by the Crimean Titanium plant.
The Ukrainian president's envoy to Crimea based in Kherson suggested that Russia may be experimenting with chemical weapons there.