BROOKLYN - Three people have been hospitalized after a possible carbon monoxide incident on Arlington Avenue.

Fire officials say the call came in at around 5 a.m. Shortly after firefighters arrived, the three victims were taken to Jacobi Medical Center in the Bronx.

Authorities say the three victims remain in very serious condition.

A neighbor says an elderly woman lives on the property with at least two other women, though they usually keep to themselves.

Fire officials say it is not yet clear what sparked the incident.