A 20-year-old man was killed after crashing a motorcycle Sunday night, Lawrence police said.

The victim, who was not identified by police Monday, was taken by air ambulance to Kansas University Hospital after the accident, which occurred about 7:55 p.m. Sunday near the intersection of Princeton Boulevard and Peterson Road.

“He struck the median curb, which caused him to become airborne,” said Kim Murphree, police spokeswoman. “He landed against a small tree in the median.”

Police said the man was not wearing a helmet and died at the hospital.