Geoconfirmedin pitkähkö ketju perusteluineen Khmelnitskyin iskusta.
LINKKI
A former soviet ammunition depot. 2011: "30,000 tons of ammunition are stored three kilometers from Khmelnytskyi"
2017: "Nearby are warehouses where aviation ammunition has been stored since 1949"
How? According to
http://Dailymail.co.uk: "Four Shahed drones hit an army facility causing an explosion which damaged nearby residential properties, as well as other buildings. Another 17 drones were shot down by air defense."
We know that it was an old storage facility with old soviet ammunition. It's impossible to assess what is blown up.
Conclusion:
It's likely 4 Russian Shahed drones caused the explosion in Khmelnytskyi after they penetrated the Ukrainian Air Defense bubble. The ammunition depot is destroyed. What was blown up is unknown.