"Three of the wounded remain in a critical condition," Health Minister Mehmet Muezzinoglu was quoted as saying by the Haber-Turk newspaper.
Interior Minister Muammer Guler said the number of suspects held by the Turkish police had risen to 13, the private NTV television reported.
The attacks in the town of Reyhanli were the deadliest since the start of the uprising against the regime in neighbouring Syria two years ago.
The attacks also provoked a backlash against Syrian refugees in Turkey, whose number is around 400,000 but government officials have repeatedly warned against provocations and said Turkey will maintain its open-door policy for Syrians fleeing the regime's crackdown.