Ukraine’s Air Force reported a threat of a possible nuclear-capable missile fired from a Russian strategic nuclear testing site late Thursday, according to reports. Explosions were reported in the western city of Lviv after the threat of an intermediate-range ballistic missile was detected from Russia’s Kapustin Yar site just before midnight,

Russia hit Ukraine with a hypersonic ballistic missile 40 miles away from the border with Poland, in what has been described as a “grave threat” to European security.

The missiles caused a widespread power outage across the Ukrainian capital as nearly 6,000 buildings were left without heat amid daytime temperatures of about minus-8 degrees Celsius, news agency AP r...