Ukraine side cited progress in establishing humanitarian corridors, despite negotiators from Ukraine and Russia failing to reach a breakthrough during a third round of peace talks on Monday. Safe corridors meant to allow Ukrainian civilians to flee the country, which were negotiated in the second round of talks, failed to materialize earlier in the day. The cease-fire began early Monday to allow refugees to flee in four Ukrainian cities — Kyiv, Kharkiv, Sumy and the southern port city of Mariupol — but was quickly shattered. Lead Ukrainian negotiator Mykhailo Podolyak said there had been s...