Russia’s attack drones are evolving into cruise missiles. Ukraine got a close look at the latest one.

What happened: Russia has begun using the K5-K, a variant of its Geran-5 jet-powered drone, to attack Ukrainian cities, according to Ukraine's GUR military intelligence agency. Experts found a nearly intact munition in a field. Key numbers: Altitude nearly 20,000 feet, up from 16,000. Why it matters: The GUR says the K5-K can already be classified as a small-sized cruise missile, a development that could further challenge Ukraine's air defense operations. ISW analysts say such low-cost weapons can strain Ukraine's scarce air defense stocks.

Russia has begun using the K5-K, a variant of its Geran-5 jet-powered drone, to attack Ukrainian cities, according to Ukraine's GUR military intelligence agency. Experts found a nearly intact munition in a field.

The GUR says the K5-K can already be classified as a small-sized cruise missile, a development that could further challenge Ukraine's air defense operations. ISW analysts say such low-cost weapons can strain Ukraine's scarce air defense stocks.