TOPEKA, Kan. (AP) — A preliminary report says a small plane that crashed in suburban Chicago was nearly vertical to the ground when it went down, killing three Kansas physicians.

The National Transportation Safety Board report does not detail a cause of the Oct. 12 accident in the Chicago suburb of Palos Hills, Illinois. The crash killed Tausif Rehman and Ali Kanchwala, both physicians at Stormont-Vail HealthCare of Topeka, and Maria Javaid, a cardiologist at Providence Medical Center in Kansas City, Kansas.

The Topeka Capital-Journal reports the preliminary report says Rehman was piloting the twin-engine Beechcraft Baron when it took off from Midway Airport in Chicago bound for Lawrence, Kansas.

Weather conditions at the time included mist and overcast skies but the preliminary report doesn’t say whether that contributed to the crash.