Friendly fire WWII

on a note that i read in a book, sometime ago,in north afrika,,42 43.some USA or english troops were in a aera were some germans troop transports, was about? then,a small sqn, of liberater bombers were to bomb, there depo .but as they were in the wrong aera they started dropping there bombs, on allied troops,....
then a sqn, of RAF mosquito bombers were ordered to shoot the liberaters down, whitch they did,,can anyone confirm this story,or is it ,true.
gary,,,