From the German 334. Infanterie Division, 2230 hours, 5 April 1944:
In a conversation with IA [Operations Officer] of FANAL [code name of Fliegerführer Luftflotte 2] PX5A [map reference for Palombaro] is reported as a fighter-bomber target, being a concentraion point for supplies and enemy assembling. Slight air defence is probably in the target area. Heavy AA battery in area QX5C since yesterday.