TULSA, Okla. (AP) — A relative says one of the people killed in Sunday's small plane crash near the Tulsa suburb of Collinsville was a retired doctor who lived in Kansas.

TULSA, Okla. (AP) — A relative says one of the people killed in Sunday's small plane crash near the Tulsa suburb of Collinsville was a retired doctor who lived in Kansas.

Rod Marshall tells the Omaha World-Herald (bit.ly/16IML7r) that his twin brother, Ronald Marshall, was aboard the plane with another passenger when it crashed.

Rod Marshall says his brother was a retired gynecologist who lived in Manhattan, Kan. Federal records show the plane was registered to Ronald Marshall out of DeWitt, Neb., where he owned land.

A second passenger, Chris Gruber, was identified earlier by officials at Kansas State University.

The Federal Aviation Administration says the single-engine aircraft departed Tulsa around 5:50 p.m. Sunday en route to Manhattan, Kan. The plane crashed inside the city limits of Collinsville, about 30 minutes northeast of Tulsa.