Russia Is Continuing to Build Up Forces Near Ukraine, NATO Chief Says

Russia is continuing its military buildup around Ukraine, the North Atlantic Treaty Organization’s secretary-general said, even as Moscow announced that it began drawing down some of its troops and released footage of tanks and armored personnel carriers being removed from the Crimean Peninsula.

On Wednesday, the day on which some U.S. intelligence officials had said a Russian invasion was likely to occur, Ukrainians rallied across the country in a display of solidarity and defiance, raising the national flag and singing the anthem in morning ceremonies. The country was rattled by a cyberattack the...