A blaze tore through a Russian arms depot deep inside the country, triggering explosions and the closure of a major highway, after Ukraine overnight launched over 100 drones at Russia and occupied Crimea, Russian news reports and the Defense Ministry said.

The depot appeared to be just kilometers (miles) from another that was struck by Ukrainian drones early Wednesday, injuring 13 people and also causing a huge fire.

Russian authorities on Saturday closed a 100-kilometer (62-mile) stretch of a highway and evacuated passengers from a nearby rail station after the fire caused a series of explosions. Posts on local Telegram channels on the messaging app said a missile depot was struck near the town of Toropets, in Russia’s Tver region about 380 kilometers (240 miles) northwest of Moscow and about 500 kilometers (300 miles) from the Ukrainian border.

Unverified images circulating on Telegram showed a large ball of flame rising into the night sky and dozens of smoke trails from detonations.

An ammunition depot and missile arsenal in southwestern Russia also caught fire in a separate attack Saturday in the Krasnodar region, triggering evacuations after the blaze caused a series of blasts. Videos on social media showed bright orange clouds rising over the horizon, as dull thuds of detonations sounded almost continuously.

Russia’s Defense Ministry early on Saturday claimed that its forces overnight shot down 101 Ukrainian drones over Russian territory and occupied Crimea. There were no immediate reports of casualties in either Russian region.

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