Four people have been arrested and charged with murder and kidnapping in connection to the disappearance of two Kansas women in a rural Oklahoma county, where two bodies were found over the weekend.

Veronica Butler, 27, and Jilian Kelley, 39, were on their way to pick up children but never made it to the pickup location on March 30, according to a missing person's poster from the Texas County Sheriff's Office in Oklahoma.

It's unclear what the connection between the two women is. Investigators have said they suspected foul play in their disappearance.

“They never made it to the pickup location. Their car was located abandoned on the side of the road,” according to the Endangered Missing Advisory activated by the Oklahoma Highway Patrol.

The agency said Sunday that two bodies were recovered in rural Texas County. The bodies will be taken to the Medical Examiner's Office to determine identification and cause and manner of death.

"This is still an ongoing investigation," the Oklahoma investigation bureau said in a post on Facebook.

A timeline of events so far 

◾ March 30: Texas County, Oklahoma, Sheriff’s Department posts missing poster on social media, providing details about the women’s physical appearance and photos. 

◾ March 31: Oklahoma State Bureau of Investigation announced they were asked to assist in investigating a “suspicious” disappearance in Texas County. 

◾ April 3: OSBI said that “based on the information obtained from the victim’s vehicle, our investigators believe there was evidence to indicate foul play.” 

◾ April 13: Police arrest four people in connection to the women's disappearance. All four were booked into the Texas County jail Saturday, each for two counts of first-degree murder, two counts of kidnapping and one count of conspiracy to commit murder in the first degree, the Oklahoma State Bureau of Investigation said. Official charges have not been filed.

◾ April 14: OSBI announced that two bodies were recovered in rural Texas County and will be taken to the Medical Examiner's Office for identification.

Contributing: Jana Hayes, Moran Elwell