Police fatally shot a man Tuesday about a mile from the main site of the Republican National Convention in Milwaukee, CNN reported..

Witnesses said two men were fighting in a local park when one pulled out a knife, and was then shot by multiple police officers. The American network reports that the details of the incident have not been confirmed by the police.

The officers involved were from the Columbus, Ohio Police Department, according to a statement from the Fraternal Order of Police posted on social media.

The Ohio agency is responsible, among several other police departments, for security at the Republican convention site, the statement continued.

The Milwaukee Police Department is expected to provide additional information “as it becomes available,” authorities said in a social media post.