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KATY (CBS NEWS) – A Texas transportation company employee was killed and another was wounded when a former employee walked into the business Wednesday morning and opened fire, police say.

The shooter then took his own life, according to Harris County Sheriff Ron Hickman. According to Hickman, the shooter had been terminated from the business, Knight Transportation in Katy, earlier Wednesday.

The former employee was carrying a shotgun and a pistol when he walked into the business just before 9 a.m., Hickman said. Only the shotgun was fired.

Officials with the Katy Independent School Districts ay a high school across the street from the facility was on lockdown for about an hour. Three other district campuses were also briefly closed as a precaution.

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