Dixon High School Shooting in Illinois: Live Updates

UPDATE: 3:40 p.m. EDT—Police identified the school resource officer who stopped  a gunman at Dixon High School in Illinois Wednesday as Mark Dallas. Dallas was praised for his actions by Dixon Mayor Liandri Arellano Jr.

"A lot of things went right today when a great many of them could have gone wrong," he said. "Things could have gone much worse."

UPDATE: 1:03 p.m. EDT—Police confirmed several shots were fired by a gunman at Dixon High School in Illinois Wednesday. Nobody was hit in the initial gunfire, and an unidentified school resource officer was able to pursue and confront the suspect, said Dixon Police Chief Steven Howell.

The suspect then shot at the officer, who returned fire and injured the male, who was arrested. The officer, whose identity had not yet been released, was hailed as a hero for stopping the shooter.

UPDATE: 12:41 p.m. EDT—Dixon Police Chief Steve Howell confirmed the suspect in Wednesday's shooting at Dixon High School in Illinois was a 19 year old former student of the school, KWQC-TV reported. 

Neither the suspect's name nor the name of the officer who shot the suspect was released. The officer was placed on administrative leave as per protocol, according to KWQC.

"As we continue to gather more information about the shooting incident at Dixon High School this morning, I extend my deepest gratitude to the Dixon Police Department, and especially the School Resource Officer (SRO) on site, for their swift action today and for keeping our students, teachers and our community safe," Rep. Adam Kinzinger said in a statement.

UPDATE: 11:53 a.m. EDT—The shooting at Dixon High School in Illinois took place on Wednesday morning inside the school's gym, where students were gathered to practice for graduation, the Chicago Tribune reported, citing City Manager Danny Langloss.

Authorities had not yet released the identity of the suspect, who was undergoing medical treatment for minor injuries. The male was believed to be a 19-year-old former student at the school, Lee County Sheriff John Simonton told Sauk Valley Media.

Original story:

A male armed with a gun opened fire on an officer at Dixon High School in Illinois on Wednesday morning. The officer returned fire and injured the suspect, the City of Dixon said in a Facebook post about the incident.

The suspect in the shooting, who sustained non-life-threatening injuries, was arrested at the scene. No students or staff were injured. The officer was identified as a school resource officer, WQAD-TV reported.

The school, along with all other Dixon Public Schools, was placed on lockdown Wednesday.

Dixon Police said they believed there was only one suspect and that there was no further threat.

This is a developing story and will be updated as more information becomes available.