Over the next several decades Somali-Portuguese tensions would remain high and the increased contact between Somali sailors and Ottoman corsairs worried the Portuguese who sent a punitive expedition against Mogadishu under João de Sepúlveda, which was unsuccessful. Ottoman-Somali cooperation against the Portuguese in the Indian Ocean reached a high point in the 1580s when Ajuran clients of the Somali coastal cities began to sympathize with the Arabs and Swahilis under Portuguese rule and sent an envoy to the Turkish corsair Mir Ali Bey for a joint expedition against the Portuguese. He agreed and was joined by a Somali fleet, which began attacking Portuguese colonies in Southeast Africa.