Bloomberg cites the Atlantic Council for hosting a Google Hangout discussion with Ukrainian intelligence chief Valentyn Nalyvaichenko:

As many as 1,300 separatists are involved in securing control over government buildings in the Donetsk region, Ukraine’s security service said. Government authorities have arrested or detained 21 Russian agents, including three intelligence officers being held and questioned in Kiev, Valentyn Nalyvaychenko, the SBU’s chief, said during an online discussion sponsored by the Washington-based Atlantic Council.

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