Arizona Globe journalist Christy Kelly has reported a troubling development following former President Donald Trump’s rally in Tucson, Arizona, last Thursday.

Kelly noted that “as many as 20 people” were affected by these symptoms, all of whom were seated on the left side of the stage.

“Many supporters seated behind Trump onstage went to the ER after the rally with “blurred vision” and “burning” to the eyes. I spoke to several who still have not fully recovered. As many as 20 were affected,” Kelly wrote on X.