A group of security operatives with dogs trained to search for explosives are checking the Verkhovna Rada, Ukraine's parliament.
Almost all chiefs of parliament's security are in the building, an UNIAN correspondent reports.
In addition, the parliament premises are being checked with the use of special devices to detect explosives.
Security measures in the Verkhovna Rada are "slightly strengthened" in connection with the latest events, head of the State Protection Service Valery Heletey said in a commentary to journalists.
"Today security measures are slightly strengthened in relation to what is happening, to the statements of security chiefs and the latest arrests," he said, adding that security officials "are doing their job".
"We want everyone to feel safe in the Verkhovna Rada - not only people's deputies, but everyone who comes to parliament," he added.
Read alsoChief prosecutor says Savchenko plotted terrorist attack on parliamentSecurity officials are refusing to explain the reasons for such a check.
As UNIAN reported earlier, Ukrainian MP Nadiia Savchenko allegedly brought three grenades and a gun to the parliament last week. Later, she was asked out of the session hall due to the threatening situation.