In 1544 Hayreddin captured the island of Ischia, taking 4,000 prisoners, and enslaved some 2,000–7,000 inhabitants of Lipari. In 1551 Turgut Reis enslaved the entire population of the Maltese island of Gozo, between 5,000 and 6,000, sending them to Ottoman Tripolitania. In 1554 corsairs under Turgut Reis sacked Vieste, beheaded 5,000 of its inhabitants, and abducted another 6,000. In 1555 Turgut Reis sacked Bastia, Corsica, taking 6,000 prisoners. In 1558, Barbary corsairs captured the town of Ciutadella (Minorca), destroyed it, murdered many inhabitants, and took 3,000 to Constantinople as slaves. In 1563 Turgut Reis landed on the shores of the province of Granada, Spain, and captured coastal settlements in the area, such as Almuñécar, along with 4,000 prisoners. Barbary corsairs often attacked the Balearic Islands, and in response many coastal watchtowers and fortified churches were erected. The threat was so severe that residents abandoned the island of Formentera.