A 20-year-old man suspected of burglarizing a Warrenton home ran into Rebecca Boone Elementary School Friday morning after being scared away from a second home by an armed property owner, according to Warrenton police. The incident caused officials to lock down all schools in the Warren County R-III School District for a short period after the suspect entered the school at the same time as students were beginning to arrive around 7:45 a.m. Police Chief Greg Houdyshell said the man was trespassing in a neighborhood located off Pinckney Street when a property owner saw him approaching a neighbor's house and fired a shot, believed to be straight into the air, to chase him off. The suspect initially told school staff upon entering the facility that he was being chased by a man with a gun. At that point school staff placed the man in a secure location by himself. Police later took the man away from the school in handcuffs and questioned him about a recent home burglary, Houdyshell said. The lockdown lasted approximately 10 minutes, according to Assistant Superintendent Dr. Gregg Klinginsmith. Classes resumed with no further disruption after authorities told district leaders the situation was under control. Houdyshell said he expected the suspect to be charged with trespassing in Friday's incident and that a burglary charge will be forthcoming as well. His name is not being released until formal charges are filed. "He had no other reason to be there," Houdyshell said. "We're looking at him pretty hard." Houdyshell said the property owner who fired his gun would not be charged for his role in the incident. He said residents in the area had become more vigilant after the recent nearby home burglary on Halloween. "It's another situation where a citizen took care of business," Houdyshell said. The R-III district sent a letter home Friday to parents and guardians alerting them to the incident. In it, Klinginsmith said the school staff followed all the procedures to secure students who were in the building and directed students who were entering the building to safe location. "I would like to commend our students and staff for how quickly and quietly they responded to this situation," Klinginsmith wrote. "I also would like to thank local law enforcement officials for their assistance during this episode. Fortunately, no immediate danger resulted from the event. As with all incidents, the procedures will be reviewed for effectiveness. Absolutely nothing is more important to us than the safety of the students and staff at Warren County R-III School District."