Early Sunday, Musk tweeted that the Times’ check mark would be removed. Later he posted disparaging remarks about the newspaper.

Twitter verification is ending for people awarded blue checks under an old system, the company says, the latest shift under CEO Elon Musk.

Shortly after taking over the company last October, Musk said he would expand a preexisting paid version of Twitter to include paying for a blue check mark.

The study, which used machine-learning tools to identify likely antisemitic tweets, found that the average weekly number of such posts “more than doubled after Musk’s acquisition.”