Five people have been killed and more than 40 injured after a car drove into a Christmas parade in the US state of Wisconsin.
A red SUV ploughed into marchers from behind, at speed, during the procession in Waukesha.
Police, who have someone in custody, haven't said whether it's terror-related.
A suspect has been arrested after several people were killed and at least 40 wounded when an SUV ploughed through a Christmas parade in the US state of Wisconsin.
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The city's mayor, Shawn Reilly described the incident as a "senseless tragedy".
"I saw the happy children sitting on the curb... I can still see their smiling faces."
"Today our community faces horror and tragedy on what should have been a community celebration," he added.
An eye witness said the event was complete chaos with "people screaming".
"I could see kids just laying on the streets and people putting blankets over them trying to attend to them."
Police Chief Dan Thompson attended the scene.
In a statement his said the vehicle struck more than 20 individuals.
One police officer fired at the SUV, in an effort to stop the driving from travelling further.