Make sure you read this headline carefully: Israeli civilians shot by Palestinian security forces after trying to break through checkpoint. I didn't even realize the PA had security checkpoints, but apparently they do. This one is outside Joseph's Tomb, a Jewish holy site under PA control.
In order to insure the security of worshipers, the IDF and PA run coordinated pilgrimages to the site on a regular basis. However, apparently some Hasidic Jews regularly attempt to visit at irregular intervals, often late at night. This shooting -- which the IDF is not characterizing as a terrorist attack, though they have condemned it -- occurred during one such instance. The PA forces saw "suspicious movement" and fired warning shots at an approaching vehicle. Unfortunately, their fire hit the car, killing one and wounding four (the dead man is a nephew of an Israeli governmental minister). The PA has detained the officers for questioning.
It is a story I've read a million times, but the roles reversed. The lesson being? Security is hard. Innocent people try to get around checkpoints, but people manning checkpoints don't know they're innocent. Tragedies happen, civilian lives are lost. It's a terrible thing.