The Russian and Ukrainian presidents, Vladimir Putin and Petro Poroshenko, discussed a recent incident in which a Ukrainian armored vehicle trespassed into Russian territory over the phone on Thursday, the Russian leader's aide Yury Ushakov said at a press briefing on Friday.
"Contacts concerning that matter took place at the presidential level as well. I do not know whether an apology was offered, but this issue was discussed," he said.
The Russian Foreign Ministry reported on June 14 that a Ukrainian Sukhoi Su-27 airplane had entered Russia's airspace without permission on June 5.
On June 12, a Ukrainian Mil Mi-8 helicopter flew up to three kilometers inside of Russian territory at an altitude of 50 meters.
An infantry combat vehicle carrying eight soldiers from the Ukrainian Defense Ministry entered Russian territory in the Kamenno-Tuzlovka area on June 13. Shortly afterwards, another infantry combat vehicle of the Ukrainian Armed Forces attempted to cross into Russia.
The Russian Foreign Ministry said it was seriously concerned "over the latest deterioration of the situation at a number of sectors of the Russian-Ukrainian state border as a result of provocative acts staged by the Ukrainian side."
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