Accusations that hundreds of ballots were cast in Arizona in 2020 in the name of dead voters are unfounded, the state’s Republican attorney general said on Monday in a sharply worded letter to the president of the Arizona Senate, who has advanced false claims of voter fraud.

The attorney general, Mark Brnovich, wrote in his letter to Senator Karen Fann that his office’s Election Integrity Unit had spent “hundreds of hours” investigating 282 allegations submitted by Ms. Fann, as well as more than 6,000 allegations from four other reports. Some of them “were so absurd,” he wrote, that “the names and birth dates didn’t even match the deceased, and others included dates of death after the election.”…

“Our agents investigated all individuals that Cyber Ninjas reported as dead, and many were very surprised to learn they were allegedly deceased,” Mr. Brnovich wrote in his letter. His office concluded, he wrote, that “only one of the 282 individuals on the list was deceased at the time of the election.”

Mr. Biden won Arizona by a little over 10,000 votes.