Man arrested after SUV hit crowds at a Christmas parade may have been fleeing a knife fight, local media report says

• At least five people died after an SUV drove into a Christmas parade in Wisconsin on Sunday.
• Unnamed law enforcement sources told NBC Chicago the driver may have been fleeing a knife fight.

The driver of an SUV who drive into a Christmas parade in Waukesha, Wisconsin, may have been trying to escape after a knife fight, according to a local media report.

A red Ford Escape drove into the parade on Sunday. Police said that at least five people were killed, and at least 40 injured.

NBC Chicago cited four senior law enforcement officials for the information. It did not name the people.

The officials said that they were considering seeking out more people involved in the fight for extra information.

The sources added that they did not believe anyone else was involved in the deaths and injuries at the parade.

The sources said the driver may have what the report called "a significant criminal history."

Little information emerged about the driver in the hours following the parade.

Police said they had detained a person of interest, whom they did not name, as well as a vehicle.

Click here for Insider's full coverage of the apparent attack in Waukesha.