Indonesian rescue teams are battling to reach hundreds of people believed to be missing a day after a tsunami struck small islands off the coast of Sumatra. Officials say a 3m-high wave crashed into the Mentawai islands, leaving more than 100 people dead and 500 missing.Rescuers continue to be hampered by bad weather and aftershocks from the quake that caused the tsunami.Officials said Indonesian President Susilo Bambang Yudhoyono would fly back from a meeting with regional leaders in Vietnam to help deal with the tsunami aftermath.