Two Topeka residents were injured Sunday evening in a motorcycle accident just northwest of Lawrence, said Jefferson County Sheriff Jeff Herrig.

Herrig said Michael Padorke, 44, lost control of the motorcycle about 5:45 p.m. while headed east on U.S. Highway 24 at the curve at Phillips Road. Herrig said officers thought Padorke was driving too fast to negotiate the curve in the highway.

Padorke and his passenger, Alisha Langham, 36, were not wearing helmets, Herrig said. Both suffered head injuries that are not thought to be life threatening, he said.

Padorke was flown via LifeStar helicopter ambulance to Kansas University Hospital in Kansas City, Kan., and Langham was taken by Jefferson County Emergency Medical Services ambulance to Stormont-Vail Regional Health Center in Topeka. Officials at both hospitals said Monday they were not able to release information about either person’s condition because of patient privacy policies. Herrig said there was no evidence Padorke was impaired before the crash.