Ukrainians Were Likely Behind Kremlin Drone Attack, U.S. Officials Say

U.S. officials said the drone attack on the Kremlin earlier this month was likely orchestrated by one of Ukraine’s special military or intelligence units, the latest in a series of covert actions against Russian targets that have unnerved the Biden administration.

U.S. intelligence agencies do not know which unit carried out the attack and it was unclear whether President Volodymyr Zelensky of Ukraine or his top officials were aware of the operation, though some officials believe Mr. Zelensky was not.

The agencies reached their preliminary assessment in part through intercepted...