Opposition demonstrators march in Kiev protesting deal over Russian military presence . The opposition says the agreement will give Russia a permanent base on Ukraine's border with Russia. In exchange , Ukraine gets 30 percent cut in price of natural gas from Russia . `` We understand that the Black Sea Fleet will be one of the guarantors of security on the Black Sea . '' Ukraine and Russia had been at odds during previous Ukraine administration .
Opposition demonstrators march in Kiev protesting deal over Russian military presence . The opposition says the agreement will give Russia a permanent base on Ukraine's border with Russia. In exchange , Ukraine gets 30 percent cut in price of natural gas from Russia . Ukraine and Russia had been at odds during previous Ukraine administration .