The sea mammals were being trained in a Soviet-era facility in Sevastopol that breeds marine assistants for the navy.
Ukraine's Oplot fires at the same speed as Russia's T-90 and can even outpace it on the road, but so far Kiev has only exported the machine to other countries.
The Sokil drone system is a success, Ukraine's National Security and Defense Council announced, saying the next step is deploying the kit to the battlefield.
Kurt Volker blames the conflict in eastern Ukraine on Russia.
Putin is keeping an eye on proceedings and reports suggest Russian missile defenses in Crimea are at the ready.
A Ukrainian national was arrested driving into rebel-held Horlivka with hidden cash.
The social media pages of Ukraine's security forces were hijacked on Independence Day.
Putin-backed forces appear to be trying to encircle the city, which stands on the road to Crimea.
Separatist forces called back from leave to mount massive offensive this month or next.