Some days are like that... every foray in Google today brings me another "friendly fire" case. I swear I'm not searching these !
26 October 1942: Ju 87 D-1 WNr 2629 of III./StG 1 shot down by German artillery shell near Strelitsy, USSR. Both crew (Hptm Heinz Fischer (pilot and Staka 7./StG 1) and Uffz Fritz Zethmeier (radio)) were killed
More details (in French):
http://www.luftfahrtverlag-start.de/...anzoesisch.pdf