NEW YORK — Authorities say a nun has jumped from a second-floor window to escape a suspicious fire at a New York City convent.

The 45-year-old woman suffered back injuries but was stable at a hospital Saturday after the early morning blaze on Staten Island. Police say they are investigating the fire as a possible bias incident.

Officials say the blaze at the St. Joseph Hill Convent started at about 5:30 a.m. and was under control about an hour later.

The fire department says a second resident suffered minor injuries but refused treatment at the scene. Four firefighters were injured.

The convent is on the grounds of St. Joseph Hill Academy, a 14-acre Catholic school for kindergarten through 12th grade.