Tens of thousands of travellers have been stranded on Bali after an erupting volcano forced the Indonesian island's international airport to close until at least Wednesday morning. <br /> <br />Mount Agung has been hurling clouds of white and dark gray ash about 4,000 meters (13,123 feet) into the atmosphere and lava is welling up in the crater. <br /> <br />Indonesian authorities raised their warning for the volcano to the top level four alert yesterday, and told residents around the mountain to immediately evacuate, warning of an "imminent" risk of a larger eruption.
