ST. CLAIR COUNTY, Ill. – A police officer was wounded, and a second person was shot dead Sunday afternoon, prompting a standoff in a neighborhood just outside Dupo, Illinois. The suspect, Reginald Allen, 40, was found dead in his garage from a self-inflicted gunshot wound.

According to a statement from the Illinois State Police, the shooting happened just after 1:15 p.m. in the 400 block of McBride Avenue.

Police say Allen barricaded himself inside a home on McBride Avenue near Interstate 255, killed a person, shot and injured a Dupo police officer, and disrupted nearly a mile-long stretch of the community.

Police responded to a call of a person down in the front yard of a home in the 400 block of McBride. They found a man shot and killed in front of the home.

Allen is the suspect in the killing. He took off in a Bobcat that belonged to his family. They were found a short time late on McBride Avenue under I-255 by a Dupo police officer. When confronted, Allen shot the officer in the shoulder and neck.

Police say Allen then took the officer’s cruiser and took it back to his own home in the 700 block of McBride Avenue. Officers found the vehicle there and a standoff began that lasted until around 10:30 p.m. Sunday.

Police stopped residents from driving down Stolle Road, telling them it was too dangerous to go home. Police blocked traffic for several hours.

A medical helicopter landed on McBride Ave. around 3:30 p.m. and remained parked. Officers from Waterloo, Fairview Heights, and Illinois State Police were parked on Stolle and would not let media approach McBride.

Richard Jones, who lives a few doors down from where the Dupo officer was shot, said he heard sirens outside his home. When he stepped outside, he said what he saw made him feel “uncomfortable.”

“Have you ever woken up, and walked out your door, and walked outside, and seen 150 cops lined up down your road? Would it make you feel uncomfortable?” he said.

A woman standing along Stolle Road heard her son was dead and waiting to hear from authorities. Meanwhile, another bystander was pacing along the street. He said his friend was inside a home nearby and, “He’s like a brother to me. I’m trying to get him out.”