WASHINGTON (AP) — The number of U.S. mass killings linked to extremism over the past decade was at least three times higher than the total from any other 10-year period since the 1970s, according to a report by the Anti-Defamation League.

The report, provided to The Associated Press ahead of its public release Thursday, also found that all extremist killings identified in 2022 were linked to right-wing extremism, with an especially high number linked to white supremacy. They include a racist mass shooting at a supermarket in Buffalo, New York, that left 10 Black shoppers dead and a mass shooti...