WASHINGTON — Three people are in the hospital after a carbon monoxide leak in Montgomery County. Montgomery County Fire and Rescue called to a house on Parkwood Drive and Parkwood Terrace, in Bethesda, detected high levels of carbon monoxide and removed three unconscious adults from the house. One person has potentially life-threatening injuries, one has serious injuries and another was taken to the hospital for precaution. A family member found the three around 10:30 a.m. The cause of the leak was the furnace/boiler, the gas company said. A Montgomery County spokesman told NBC Washington that the house was being renovated.

#MORE INFO: Crews say furnace was running in basement, family living there during house renovations @fox5dc pic.twitter.com/o8ucK8nLDm

— Kristyn Leon (@Kristyn_leon) January 31, 2018

Below is a map of the area. [google_map latitude=”39.023336″ longitude=”-77.096490″ zoom=”13″ height=”300px” location_label=”Parkwood Drive-Terrace-CO-leak”] WTOP’s Carlos Prieto contributed to this report.