An explosion on February 17, 2026, partially destroyed a military police building in Sertolovo, near St. Petersburg, Russia, resulting in three fatalities. The bodies were discovered under the rubble of the partially collapsed structure, with reports indicating additional injuries. Governor Alexander Drosdenko confirmed the deaths via Telegram, and witnesses reported the explosion was audible for kilometers. Russian authorities, including the Investigative Committee, have launched an investigation into negligence and potential fire safety violations, though the exact cause remains undetermined. While gas leaks are a common cause of building collapses in Russia, the incident occurs amidst ongoing Ukrainian attacks on Russian military facilities since February 2022.