The German report on the Mediterranean situation
here says for enemy activity:
On the night of 2/3 May enemy aircraft attacked Barce, Benghazi, the airfield at El Feteja Uadi (?) and Tripoli. 3 ships damaged.
On the night of 3/4 May enemy aircraft attacked Derna and Benghazi. 2 Ju 88s and 1 Ju 52 were damaged on the airfield at Benina.