I haven't seen anything about "four other officers" being hit by fragments. Where does this come from?
It's in the story below: "Investigates has learned that four Pittsburgh police officers assigned to the former president’s motorcade yesterday suffered minor injuries during the shooting.
The four motorcycle officers were part of Donald Trump’s escort to and from the rally in Butler.
Sources tell Chief Investigator Rick Earle the officers were just feet away from Trump when shots rang out. The four officers suffered minor injuries from flying debris caused by the bullets. Sources say the officers were hit with either plastic or metal fragments when the bullets struck objects nearby."
And Trump's doctor, Ronny Jackson, said his nephew, who was in the crowd, was grazed in the neck by an unknown object.
Link:
https://www.yahoo.com/news/live-updates-apparent-shots-fired-223759785.html