Report: U.S. forces killed scores of Russian mercenaries in Syria

A coalition air strike in Syria. Photo: Delil Souleiman / AFP via Getty Images

American forces in Syria killed at least 100 Russian mercenaries fighting for Syrian leader Bashar al-Assad after they launched a failed — and perhaps rogue — attack on a base and oil refinery held by U.S.-led troops, Bloomberg reports, citing a U.S. official and three Russian sources. The U.S. military accepted Russia's claim that it had nothing to do with the attack.

Why it matters: It may have been "the deadliest clash between citizens of the former foes since the Cold War," per Bloomberg.