BAY POINT — Contra Costa sheriff's deputies arrested one of two women suspected of robbing a bicyclist Thursday afternoon.

The victim, a man, was riding a bicycle near the intersection of Willow Pass Road and Kevin Drive about 2:25 p.m. when he was approached by two women, sheriff's Sgt. Sharon Sparvoli said.

One of the women pulled out a knife and demanded money. He gave them some cash from his wallet, and the robbers ran away. Sheriff's deputies showed up five minutes later and canvassed the area, Sparvoli said.

One suspect, 25-year-old Bay Point resident Jamie Dawson, was found and identified by the victim. She still had the knife used in the crime, Sparvoli said. The other suspect and the victim's money remained missing.