The European Union and Ukraine have agreed on terms to boost the flow of natural gas from the 28-nation bloc to the former Soviet state, Slovak pipeline operator Eustream said late Saturday. “Representatives of Eustream and [Ukrainian pipeline operator] Ukrtransgaz will sign the document on Monday,” Eustream said in a statement. The two sides agreed that the fastest and least legally cumbersome way to provide Ukraine with a third EU-based gas delivery route—it already has gas-flow agreements with Hungary and Poland—is to use the pipeline between Vojany and Uzhgorod, an underutilized secondary pipe on Slovakia’s eastern border. The deal would mark Ukraine’s third significant energy agreement with the West since a pro-European caretaker government . To reduce dependence on Russia, its major trade partner, Ukraine earlier this month with Pennsylvania-based Westinghouse Electric Co. until 2020 and AG . Write to Sean Carney at