The area was covered with sand about 5,000 years ago as the coast retreated inland, becoming part of the city's present coastline. Pre-Islamic ceramics have been found from the 3rd and 4th centuries. Prior to the introduction of Islam to the area, the people in this region worshiped Bajir (or Bajar). After the spread of Islam in the region, the Umayyad Caliph of the eastern Islamic world invaded south-east Arabia and drove out the Sassanians. Excavations by the Dubai Museum in the region of Al-Jumayra (Jumeirah) found several artefacts from the Umayyad period.