A 90-year-old woman and three officers were injured last night in a single-alarm Essex house fire.

BCoPD fire investigators have ruled this an accidental fire; it began in a first-floor bedroom, where a heat lamp used to warm a pet lizard fell over and ignited.

BCoPD officers arrived at 8:05 p.m. at the home in the unit block of Russell Frost Ct.,  21221. Fire units were dispatched at 8:06 p.m.

The officers found the elderly woman outside the home when they arrived. They went inside the house and attempted to put out the fire using an extinguisher, but evacuated after a short time and waited for fire personnel to arrive.

Engine 511 (Essex VFD) was the first-arriving unit; firefighters quickly extinguished the fire and placed it under control at 8:26 p.m.

The woman was transported to Johns Hopkins Bayview Medical Center.

The three officers were transported to the R Adams Cowley Shock Trauma Center for treatment of minor injuries. All were released last night.

The lizard did not survive. Several dogs that were in the house did survive.