Two street venders prepare to load bottles of Zamzam into a citizen's car in Makkah on Saturday. The Makkah Mayoralty has called upon the general public not to buy Zamzam bottles from street vendors because the bottles might not be safe for consumption as they are often exposed to direct sunlight for prolonged periods. It also said that some vendors mix Zamzam water with regular tap water. Since the beginning of Ramadan, the demand for Zamzam has increased due to the influx of pilgrims and visitors to the holy city. — Okaz photo