Authorities in Michigan are intensifying their search for a pregnant woman who has been missing since Monday.

Rebecca Park, aged 22, was last observed getting into the passenger seat of a dark-colored sedan near a family member’s residence in Boon Township. According to reports from the Cadillac News, Park had mentioned to someone that she was expecting to be picked up, but the witness did not recognize the person driving the vehicle.

At 38 weeks pregnant, Park’s disappearance is being treated as an endangered situation. The identity of the driver she left with remains unknown.

The Cadillac News also noted that Park’s cellphone was discovered on a road close to the location where she was last spotted.

Rebecca Park is described as being 5 feet 2 inches tall and weighing around 140 pounds. Anyone with information about her whereabouts is urged to contact the Wexford County Sheriff’s Office at 231-779-9216.

[Feature Photo: Wexford County Sheriff’s Office]