STAMFORD - Connecticut Light and Power says a problem at a Stamford substation is to blame for a power outage that left roughly 19,000 customers in Stamford and Greenwich without electricity this morning.

Officials say when the power went out at Greenwich High School, there were problems with the emergency generator and back-up lights, forcing administrators to evacuate the school and then release students early.

First Selectman Peter Tesei says he held an emergency meeting with the utility over what he says is all too frequent outages that the utility is doing nothing to prevent.

CL&P officials say they are reviewing the incident and constantly working to improve infrastructure.