Former Trump campaign adviser David Urban told CNN’s Wolf Blitzer that he had spoken with Dave McCormick, the Republican nominee for Senate from Pennsylvania, who was sitting in the front row of the rally. Trump told McCormick to “come up here onstage,” Urban said, at which point he heard a few “pops” that sounded like “firecrackers.”

McCormick dropped to the ground at that point, and when he got up, he said that Secret Service agents were “around everybody and they were scattering,” according to Urban.

McCormick wrote on X that he and his wife, former Trump administration official Dina Powell, “are praying for President Trump and all who were injured today in Butler PA.”

This story has been updated with additional reporting.

CNN’s Pamela Brown, Zachary Cohen, Kristen Holmes, Alejandra Jaramillo, DJ Judd, Gregory Krieg, Jamiel Lynch, Phil Mattingly, Hannah Rabinowitz, Raja Razek, Morgan Rimmer, Alayna Treene, Emma Tucker, Whitney Wild, Ryan Young and Gregory Krieg contributed to this report.