BOXHOLM, Iowa (AP) — Authorities have identified the mother and three children killed a house fire in the central Iowa town of Boxholm.

Rick Lampe with the Boone County Sheriff's Department says 27-year-old Amber Sorenson, 9-year-old Riley Sorenson, 6-year-old Autumn Sorenson and 4-year-old Brayden Sorenson all died in the fire.

The fire in Boone County created challenges for firefighters because of frigid conditions.

The fire was reported around 12:45 a.m. Sunday when the temperature was 6 degrees below zero in the town of about 200.

The victims' bodies were recovered around 2:15 a.m.

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(earlier version)

BOXHOLM, Iowa (AP) — Three children and one adult died in a house fire overnight as firefighters battled bitter cold in the central Iowa town of Boxholm.

Boone County Emergency Management Coordinator Dave Morlan tells the Des Moines Register firefighters had problems with their gear because of the cold.

The fire was reported around 12:45 a.m. Sunday when the temperature was 6 degrees below zero.

Morlan says several pumps froze up on the fire trucks, and at one point Boxholm's system ran out of water and firefighters had to bring more in from outside of town.

The Iowa State Fire Marshall's office is investigating the fire.