Ukraine war latest: Ukrainian forces retreat from 3 villages as Russia gains foothold on eastern front
Key developments on April 27-28: * Syrskyi: Ukrainian forces retreat from 3 villages in Donetsk Oblast * Military: Russia gains foothold in Ocheretyne in Donetsk Oblast * Politico: Zelensky told Johnson Ukraine could only hold on until 'March or April' without US aid * Ukraine strikes oil refineries, airfield in Russia * Russia attacks Ukraine's