They threw flares at the Russian embassy in the Ukrainian capital and burned tires in front of the consulate general in Lvov.
About it reports "Interfax-Ukraine" with reference to the press service of the Commissioner for human rights in Russia Tatiana Moskalkova.
In 2014, after the pro-Russian regime in Kiev was ousted in a coup, and a pro-NATO regime installed with US backing, Putin detached and annexed Crimea, for centuries the homeport of Russia's Black Sea fleet.
The ban is supposed to prevent Russia from "forming "private" armies, which are in fact representatives of the Russian armed force," as well as "to prevent Russians from carrying out those operations in Ukraine which they've planned back in 2014".
Poroshenko said he is also seeking to tighten the registration process for Russian citizens who are already in Ukraine, especially in the 10 regions along the border where martial law is in effect.
Ukraine also appears to have blocked all foreigners, including Russians, from travelling through the country to Crimea.
When countries gather on Sunday to hammer out how they will enact pledges to cut carbon emissions, a Norwegian-led oil consortium will offer a solution: pump some of your excess carbon dioxide to us and we could store it for you.
The Senate also accuses Moscow of "destabilizing for the entire region" and inviting further escalations. Their crews - sailors and operatives of the Ukrainian Security Service (SBU) - have been arrested by Russian authorities and stand accused of illegally crossing the state border.
The three ships are seized and 24 Ukrainian sailors taken prisoner.
Because Poroshenko, whose warships had previously transited the strait, had to know the risk that he was taking and that Russian Federation might resist.
Trump Puts Kibosh on Putin Talks, Citing Ukraine-Russia Naval Confrontation
Xi said on Wednesday the worldwide community needs to build consensus to solve the conflict between free trade and protectionism. Shortly after Trump posted the tweet , the Kremlin said it had not been notified the meeting was off.
Merkel told a Ukrainian business summit in Berlin on Thursday that Germany is urging the release of the ships and crews and that she would confront Putin at the summit. Russia's 2014 seizure of Crimea was rightly seen as a serious violation of global norms, but few at the time recognized it as creating new tinder for war-other than maybe out of a long-term smoldering Ukrainian revanchism.
In a further boost to Ukraine, the EU released 500 million euros in financial assistance to Kiev and European Council President Donald Tusk predicted Brussels would roll over sanctions on Russian Federation at a summit on December 13-14.
Ukrainian President Petro Poroshenko's comments to German media were part of a concerted push by Kiev to gain Western support for more sanctions against Moscow. The Kremlin said Poroshenko's request looked created to cause more tensions in the area.
On Nov. 29 Poroshenko asks North Atlantic Treaty Organisation members, in particular close ally Germany, to send naval vessels to the Sea of Azov to back his country in the standoff with Russian Federation.
Ukrainian President Petro Poroshenko chairs a meeting with heads of military and security forces in Kiev, Ukraine November 30, 2018. "We discussed this subject with both sides".
Germany says a blockade of access to the Sea of Azov is "unacceptable".
The announcement follows Thursday's decision by U.S. President Donald Trump to scrap his much-anticipated meeting with Russian leader Vladimir Putin at the G-20 summit in Buenos Aires.
What happened to the seized Ukrainian ships and sailors?
"We need a strong, resolute and clear reaction to Russia's aggressive behaviour", Poroshenko told the Funke newspaper group.
The Ukrainian vessels had been trying to pass through the Kerch Strait on their way to the Sea of Azov.