Oklahoma police are investigating the suspicious disappearance of two moms after the car they were traveling in was found abandoned on the side of a rural road.

Veronica Butler, 27 and her friend Jillian Kelley, 39, drove together on Saturday but never made it to their location, according to an advisory the sheriff of Texas County, Oklahoma sent out over the weekend.

ABC News reported Monday, citing Butlers church, that the two women were on their way to pick up Butlers children for a birthday party.