A power outage affected a large area of Atlantic Municipal Utilities customers today (Thursday). Officials with AMU said the incident happened at around 11:58-a.m. and ended at around 12:25-p.m.  Atlantic Schools Superintendent Steve Barber said the District was without power this afternoon. The outage was said to have spread south for a few miles. Crews flipped a breaker switch and restored power to those affected. A cause of the outage was under investigation.