Multiple people were killed and injured after an SUV drove through a Christmas parade in Waukesha, Wisconsin, on Sunday, according to CBS News.
At a press conference Sunday night, police said they have located the SUV and that a person of interest is in custody.
The exact number of deaths and injuries was not given, as families were still being notified. Police chief Dan Thompson said more than 20 people were struck by the SUV.
Videos of the incident posted on social media showed a red SUV speeding around the parade participants and eventually plowing through a group of them.
Victims have been transported to hospitals via ambulances, police officers and family members, Thompson said.
Authorities believe there are no other threats to the community, and the scene is now safe.
The motive is not yet known. The investigation is ongoing.
Waukesha Police advised people to avoid the downtown area and have established a family reunification center, the agency said on its official Facebook page.
A witness told WISN 12 she saw a driver in an SUV "barreling down the street" into people who were marching in the parade.
Witnesses reported they saw dozens of people on the ground injured and that shots were fired by the driver.