Ukraine’s deputy interior minister says negotiations were under way in the city of Poltava with ‘the attacker’.

A man armed with a grenade has taken a senior policeman hostage in the central Ukrainian city of Poltava, according to Ukraine’s deputy interior minister.
“Negotiations are ongoing to force the attacker to surrender to the police without harming himself or others,” Anton Gerashchenko said on Facebook on Thursday.
More to follow.