A plane carrying 12 people crashed soon after takeoff from Chamberlain, South Dakota, Saturday, killing nine people — including two children, the Argus Leader reports.

Details: National Transportation Safety Board spokesman Peter Knudson told AP that the Pilatus PC-12 crashed about 12:30 pm. The area was under a winter storm warning at the time of the crash, per the National Weather Service. The three survivors were being treated in Sioux Falls, South Dakota, according to the Washington Post.

Knudson said the NTSB was investigating the incident, but "inclement weather in the area is making travel to the site difficult," AP noted.

Editor's note: This article has been updated with new details throughout.