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Police in West Jordan fatally shot a man Wednesday after he barricaded himself and his family into their home and fired a gun at an officer who was trying to help the family escape through a window, investigators said.

The wife of Kyle Lambrose, 27, called 911 about 2:30 p.m. to report that Lambrose was suicidal, and she was afraid he would harm their three children, said West Jordan police Sgt. Dan Roberts. The woman, who was away from home when she called 911, returned to her house near 9500 South and 6420 West and was inside when officers arrived, Roberts said.

According to investigators, Lambrose would not let the family leave the house. Officers saw the children — ages 7, 4 and 3 — in a second-floor window, Roberts said. An officer climbed a ladder to the garage roof and went to the window to help the family get outside, Roberts said.

As the officer was outside the window, Lambrose came into the room, Roberts said. The officer climbed in the window and stood in front of the children as Lambrose raised a gun and fired "at least once," Roberts said.

The officer, whom Roberts described as "veteran," returned fire, killing Lambrose.

Investigators late Wednesday were trying to determine how many shots each man fired. West Jordan police are testing models for body cameras, and the officer who fired on Lambrose was not wearing one, Roberts said.

The three children and their mother, who also was in the room where the shooting occurred, were not injured.

Police did not immediately release the name of the officer who shot Lambrose. He has been placed on administrative leave while the shooting remains under investigation.

Twitter: @erinalberty