WATERTOWN, Wis. (CBS 58) -- Police say three people have died following a house fire in Watertown Friday, Dec. 9.

Crews responded to the home near 1st and Western Avenue around 12:36 a.m. and found the house engulfed in flames. First responders were told residents were still trapped inside.

Police say firefighters tried to rescue the victims, but were driven back by intense heat, smoke and flames.

Firefighters worked both inside and outside to eventually extinguish the blaze.

Watertown police and fire departments, along with the state fire marshal, are actively investigating.

This is a developing story. Stick with CBS 58 for updates on-air and online.