On 28 March, Ukrainian forces struck a Russian munitions factory 1,000 kilometers from the front line in Samara Oblast. The Promsintez chemical plant in Chapayevsk, was hit with the FP-5 "Flamingo", a domestically developed cruise missile, reports the General Staff.
The Promsintez facility specializes in producing explosive components used to fill munitions such as bombs and missiles. It produces more than 30,000 tons of military-grade explosives per year.
Chapayevsk: Russia's explosives hub
Chapayevsk has been a center of Soviet and Russian chemical weapons and explosives manufacturing since the Second World War. It contained one of Russia’s early chemical-weapons production sites.
The Promsintez plant specifically focuses on the explosive fill that go into the warheads of the bombs and missiles Russia fires at Ukrainian cities and troop positions.
Destroying or degrading its output capacity would reduce the volume of ready munitions Russia can move to the front.
FP-5 Flamingo: Ukraine's deep-strike arm
The FP-5 Flamingo is a Ukrainian-developed cruise missile designed for strikes on stationary high-value targets beyond the reach of conventional artillery.
Its use against Chapayevsk confirms that Ukraine now regularly employs domestically produced long-range strike systems against Russian defense-industrial infrastructure—factories, refineries, and logistics hubs that feed the war machine rather than front-line forces.
On the same day, the General Staff of the Armed Forces of Ukraine reported that the Yaroslavl oil refinery in Russia was hit, one of the key fuel supply hubs for the Russian army.
Currently, at least 40% of Russia's oil export capacity has been halted due to Ukrainian drone attacks, the seizure of tankers, and Russia's own strikes on the Druzhba pipeline, according to Reuters.
Ukraine has accelerated attacks on Russian territory throughout 2025 and into 2026 aiming to cut the oil and gas revenues that account for around a quarter of Russia's state budget. Oil accounts for a central share of Russia's $2.6 trillion economy, and with oil prices topping $100 per barrel due to the Iran war.
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