Russian soldiers infiltrated Kupiansk using underground pipes running beneath the Oskil River, a tactic previously refined in Avdiivka and Sudzha.
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Several underground pipes running under the Oskil River were used by Russian soldiers to enter Kupiansk
This infiltration practice was already refined elsewhere, such as in Avdiivka and Sudzha in Kursk Oblast
Russian forces conducted offensive operations in northern Kharkiv Oblast
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Extraction metadata
Extracted: 2026-02-22T18:49:16.010Z
Source story: russian-troops-back-in-central-kupiansk-kharkiv-oblasts-once-liberated-city