The Sultan arrived with Sokollu Mehmed's sons, Kurt Bey and Hasan Bey, at Pécs. Finally, the large Ottoman force, which numbered between 100,000 and 300,000 soldiers and 300 cannons, laid siege to Szigetvár. The Battle of Szigetvár was an Ottoman victory, with heavy losses on both sides. Both commanders died during the battle: while Zrinsky was killed in the final charge, Suleiman the Magnificent died in his tent from natural causes, before the Turks achieved victory. According to Robert William Fraser, more than 10,000 large cannonballs where shot into the fortress during the siege.