Wisconsin

"At this time, we can confirm that five people are deceased and over 40 are injured," the Waukesha Police Department said on its Facebook page. "However, these numbers may change as we collect additional information."

Waukesha Police chief Dan Thompson earlier told reporters that a person of interest was in custody and a vehicle had been recovered after the incident in the town, about 32 km west of Milwaukee.

EAA spokesman Dick Knapinski says a Piper Malibu went down on a runway at Wittman Regional Airport in Oshkosh shortly before 8 a.m. Wednesday.

Thick black smoke can be seen billowing from the runway. Oshkosh firefighters are at the scene.

The airport has been temporarily closed.

Knapinski says one of the five people has been taken by air to a hospital. He says the other four were taken to hospitals by ambulance.