Three people were killed after a medical helicopter crashed in Wisconsin, a local TV reported on May 11.

According to the local WISCTV, the medical helicopter belonging to the University of Wisconsin disappeared at night on May 10 from La Crosse after sending back a patient to the community, and was found crashed in the same area the next morning.

The victims were identified as Darren Bean, a physician, Mark Coyne, a registered nurse, and Steve Lipperer, the pilot, all from Madison, the report said.

Allan Tiedy, a La Crosse County Emergency Dispatch Center official, told the TV that the crash site was in Onalaska town, only about four miles (6.4 kilometers) from the airport they took off.

During a morning news conference, local authorities told reporters that they have no details on what might have happened to the helicopter, but preliminary reports suggest that the craft might have struck a hill or flown into some trees.

The university officials said that they would be cooperating with the Federal Aviation Administration (FAA) investigation.