Foul play is suspected in the disappearance of two Kansas women whose vehicle was found abandoned in the Oklahoma Panhandle last weekend, authorities said Friday.

Veronica Butler, 27, and Jilian Kelley, 39, of Hugoton, Kansas, were driving to Oklahoma to pick up Butler’s children to attend a March 30 birthday party in Kansas but never showed up, Tom Singer, the pastor of the church Butler attended, told KOCO-TV.