When a powerful blast shook a Russian city near the border of Ukraine residents thought it was an Ukrainian attack. But the Russian military quickly acknowledged that it was a bomb accidentally dropped by one of its own warplanes.
Belgorod, a city of 340,000 about 40 kilometers (25 miles) east of the border, has faced regular drone attacks that Russian authorities blame on the Ukrainian military, but the explosion late Thursday was far more powerful than anything its residents had heard before.
