At Aybut Al-Auwal (First Aybut) in Wadi Aybut (west-central Nejd), a site was discovered in 2011 containing more than 100 surface scatters of stone tools belonging to a regionally specific lithic industry, the late Nubian Complex, known previously only from Northeast Africa. Two optically stimulated luminescence age estimates place the Arabian Nubian Complex at 106,000 years old. This provides evidence for a distinct Middle Stone Age technocomplex in southern Arabia around the earlier part of the Marine Isotope Stage 5. Bronze Age sites of the Dhofar Survey include tomb complexes found at Hodor (al-Hudfir).