In the 1990s, the Dallas Pistol Club had a boy shot in the head and was killed during a match. He was actually inside the air rifle building when a round left the match area, entered the building high and apparently was deflected downward, striking the boy.
Around 2000-2002, a man was shot in the buttock (.40 cal, I recall) at the Collin County Gun Club (no longer in business). The round came from an adjoining range, apparently passing through a drain pipe between the two ranges and deflecting upward into his butt after passing through his wallet. I actually chatted at some length with the man about the incident.
In both cases, the resultant woundings would not have occurred had proper safety equipment been in place. At DPC, the shot was believed to have been a high shot that passed through poorly maintained, gapped wooden baffles. At CCGC, the drain pipe was not baffled at all and was just a straight tube between the two ranges.