Updated May 24:
Service has been restored to the 550 customers affected by Saturday's power outage.
Hydro One has reported a power outage in the Sudbury district affecting 550 customers from the area of Killarney to Chelmsford.
Crews have been dispatched with an expectation to restore service by 5:45 p.m.
Hydro One has yet to determine the cause of the service interruption.