Police are investigating after a 75-year-old woman was carjacked at knifepoint in south county Tuesday morning.

The woman reported she was approached by a suspect who displayed a knife and took her vehicle. The incident occurred at the K-Mart on the 3900 block of Lemay Ferry Road around 10:25 a.m.

The suspect fled the scene in the victim's vehicle, which was later found at Walsh and Alabama.