House Speaker Paul Ryan scolded Donald Trump for a tweet sent from his account over the weekend that was considered anti-Semitic.

"Look, anti-Semitic images, they've got no place in a presidential campaign. Candidates should know that. The tweet's been deleted," Ryan said by telephone with WTMJ's Charlie Sykes on his radio show Tuesday.

Ryan added that he didn't know what "flunky" put out the tweet, but that they've "obviously got to fix that." He also called for the campaign to refocus on "the issues that matter to the public."

Ryan, who has endorsed Trump, told Sykes, who is part of the "Never Trump" contingent, that he didn't remark on the tweet when it was originally sent on Saturday because if he "had to stop everything and comment on a ridiculous tweet sent out by this campaign, I'd have no time for anything else.

"Yeah, I really believe he's got to clean up the way his new media works," Ryan said. "The point is, I think he's got to clean this up. My understanding is that this was done by staff, not by he himself. But more importantly, they've got to clean this thing up."

The Trump tweet was an anti-Hillary Clinton message that included a six-pointed star, which is the shape of the Star of David. It has since been deleted and replaced with a circle.