ADDIS ABABA - Sudan will free ships carrying cargos of crude it seized from South Sudan to ease tensions between the former civil war foes and help the two states agree on a deal over oil revenue, Sayed El-Khatib, deputy head of negotiating team said on Saturday. "President Bashir is ready to make this gesture. Sudan is going to release the vessels detained in Port Sudan," he told a media conference in the Ethiopian capital. South Sudan became independent in July under a 2005 peace agreement with Khartoum that ended decades of conflict but both sides have failed to agree how to untangle their oil industries. The new landlocked nation needs to use a northern pipeline and the port of Port Sudan to export its crude but has failed to reach an agreement with Khartoum over a transit fee, prompting Sudan to start seizing oil as compensation. South Sudan said on Monday it had started shutting down oil production and accused Sudan of seizing $815 million worth of crude. South Sudan's top negotiator said on Friday his country would complete the shutdown by Saturday, after Sudanese President Omar al-Bashir and South Sudan's President Salva Kiir met on the sidelines of a meeting of East African officials in Ethiopia.