A large Russian drone-and-missile attack has targeted Ukraine’s eastern city of Kharkiv, killing at least three people and injuring 21.

Former Rep. Chris Stewart, a former fighter pilot, says the U.S. isn’t prepared for this change in modern warfare.

Both sides are now using large numbers of attack drones controlled via fiber optic cables which are immune to radio jamming making them effectiveley unstoppable.

Russian ballistic missiles have been launched toward Ukraine from multiple directions, the Ukrainian Air Force said on Telegram Friday.

Technological advances have given threadbare militaries and rebel fighters the ability to strike stunning blows against far stronger forces.

PRYLUKY, Ukraine (AP) — At least five people, including a 1-year-old child, his mother and grandmother, were killed Thursday in a nighttime Russian drone attack on the northern Ukrainian city of Pryluky, officials said.

The Pentagon notified Congress last week that it will be diverting critical anti-drone technology that had been allocated for Ukraine to US Air Force units in the Middle East, according to correspondence obtained by CNN and people familiar with the matter.