By CBS3 Staff

READING, Pa. (CBS) — A 9-year-old boy was killed in a house fire in Berks County. Officials say firefighters rushed to a two-alarm fire on the 900 block of Muhlenberg Street in Reading around 9:45 a.m. Thursday.

The fire grew to three alarms, according to officials.

READ MORE: Pennsauken Police Searching For Hit-And-Run Driver Who Killed Shadid Fauntleroy While Crossing Route 130

Officials say the mother and another child were rescued from the fire. They remain in critical condition at the hospital, according to officials.

READ MORE: Upper Darby Mayor Unveils Plan To Resolve Battle Over Control Of Summer Stage

Reading Mayor Eddie Moran issued the following statement, “As you may be aware, an incident involving a serious fire has happened at 900 block of Muhlenberg Street. I am asking everyone to please keep this family and the First Responders in your prayers and thoughts as they navigate this emergency. We all appreciate it.”

There’s no word on what caused the fire.

MORE NEWS: Man Robs 16-Year-Old Girl At Knifepoint At SEPTA Station, Police Say

EDITOR’S NOTE: The original version of this article reported four family members removed from the house. According to officials, the only occupants inside the home at the time of the fire were a 9-year-old, a 32-year-old, and a 2-year-old child. We apologize for this error.