The Round Lake Beach Police Department and the Northern Illinois Police Alarm System (NIPAS) Emergency Services Team respond to the 0-100 block of West Tall Grass Court in Round Lake Beach for a report of an armed person inside a home following a disturbance Saturday evening. | Photo: Woo-Sung Shim / Lake and McHenry County Scanner

A report of a man armed with a knife inside a residence where a child was injured prompted the response of a SWAT team and led to a standoff in Round Lake Beach.

The Round Lake Beach Police Department responded around 5:48 p.m. Saturday to the 0-100 block of West Tall Grass Court for a disturbance in progress.

Round Lake Beach Police Chief Wayne Wilde Jr. said a 911 caller reported an adult male had threatened people in the home with a knife and a child had been injured.

The Round Lake Beach Police Department and the Northern Illinois Police Alarm System (NIPAS) Emergency Services Team respond to the 0-100 block of West Tall Grass Court in Round Lake Beach for a report of an armed person inside a home following a disturbance Saturday evening. | Photo: Woo-Sung Shim / Lake and McHenry County Scanner

Officers arrived and determined the subjects involved, except for the suspect, had already exited the home.

The adult male suspect remained inside the home and refused to acknowledge police, Wilde said.

The police department requested assistance from the Northern Illinois Police Alarm System (NIPAS) Emergency Services Team.

The Round Lake Beach Police Department and the Northern Illinois Police Alarm System (NIPAS) Emergency Services Team respond to the 0-100 block of West Tall Grass Court in Round Lake Beach for a report of an armed person inside a home following a disturbance Saturday evening. | Photo: Woo-Sung Shim / Lake and McHenry County Scanner

Wilde said interviews were conducted and police determined a knife was not involved and the child suffered a scratch.

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Police and the NIPAS command staff made the determination to peacefully end the standoff, Wilde said.

Officers and NIPAS were on the scene until around 10:40 p.m., five hours after the incident began.

The Round Lake Beach Police Department and the Northern Illinois Police Alarm System (NIPAS) Emergency Services Team respond to the 0-100 block of West Tall Grass Court in Round Lake Beach for a report of an armed person inside a home following a disturbance Saturday evening. | Photo: Woo-Sung Shim / Lake and McHenry County Scanner

Wilde said officers did not want to force a potential confrontation with the man.

The identity of the man involved is not being released pending the outcome of the investigation.

The incident remains under investigation by the Round Lake Beach Police Department.