One utility worker was killed and three others injured Sunday by an apparent gas explosion in Lancaster County, Pennsylvania. The four had been responding to reports of a gas odor in a residential neighborhood near Millersville.

News reports say the blast, which occurred shortly after noon, leveled one home. A resident had been evacuated from it before the incident occurred.

Nearby neighbors felt the explosion shake their own homes. One said the noise was so loud it sounded like a bomb being detonated.

The entire block was cordoned off to the public while emergency responders cleared the scene.