It was updated on June 2, 2022, 11:26am.

A gun found at the scene of a shooting spree in a medical building in Oklahoma that left four dead and nearly 10 others injured had been purchased the day before, police said.

Police respond to the scene of a mass shooting at St. Francis Hospital.

Police respond to the scene of a mass shooting at a hospital. The photo was taken by J Pat Carter.

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The handgun found at the scene had been purchased three days before the shooting, according to the chief of police.

The suspected shooter, believed to be between the ages of 35 and 40, died from a self-inflicted gunshot wound, according to the deputy chief.

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The shooting was not believed to be a random attack and police have not publicly identified the shooter. He went to a specific floor and shot with a specific purpose. Four victims have not been identified by investigators.

There was a report of a person with a gun at the hospital. The responding officers found the man dead as they worked to clear the building. Two weeks after an 18-year-old man allegedly walked into a supermarket in Buffalo, New York, and killed 10 people in what authorities have called a racist attack, another man shot and killed two people at a school in Oklahoma.

Four people were killed in a hospital shooting.

The assault-style weapon used in the medical facility shooting was purchased that day.