The destruction of Ballaban Pasha's army and the siege of Elbasan during the previous siege of Krujë forced Mehmed II to re-attack Skanderbeg in the summer of 1467, only 2 months after the latter's victory at the 2nd Siege of Krujë. This time Skanderbeg didn't retreat immediately to the mountains, but decided for the first time to front the great Ottoman army at Burshek, on the Shkumbin river's valley in order to give time for the civil population to retreat in the mountains. The battle was carried in such a way as to not result with winners or defeated; Skanderbeg then retreated while Ottoman grand vizierMahmud Pasha Angelović pursued him but Skanderbeg succeeded in fleeing to the coast and then to the mountains. Meanwhile Mehmed II sent detachments to raid the Venetian possessions (especially Durrës which was also put under siege and bombarded for a short period) and to keep them isolated. He besieged Krujë for several days but when he realized that he could not take it by assault, he lifted the siege. Although Ottomans did not capture Krujë, they managed to plunder areas around Durres and Scutari.
. Mehmed II sent Mahmud Pasha, together with the most experienced part of the army, to pursue Skanderbeg, while he himself ravaged the rest of the land ... The Grand Vezir spent fifteen days in the mountains, but couldn't find Skanderbeg