The blood-stained body of a 35-year-old woman was found on the Jhalawar-Baran mega highway on Wednesday, police said.
The deceased was identified as Ratana Jairaj Modi, a native of Gujarat.
According to a preliminary investigation, the woman was attacked with a sharp weapon on Tuesday night, SHO at the Mundawar police station Murlidhar said.
A car, bearing Gujarat number plate, was found abandoned near Bagher Ghat, he said.
"We have lodged a case of murder under Section 302 of the IPC," the SHO said.
DSP Khanpur range Vimal Singh said police have detained one suspect for interrogation in this connection and seized a blood-stained sharp weapon lying near the body of the woman.
(With inputs from agencies.)