Two high school students have been charged with the murder of an Iowa teacher who was found dead on Wednesday.

As CBS News reports, Nohema Graber, a Spanish teacher at Fairfield High School, was found dead the same day she was reported missing. Authorities reportedly said that Graber’s body was found in Chautauqua Park in Fairfield. Her cause of death is not yet known, but she is believed to be a victim of homicide.

Two 16-year-old students at the high school are in custody in connection to Graber’s death. Willard Noble Chaiden Miller and Jeremy Everett Goodale have each been charged with first-degree homicide and conspiracy to commit homicide, CBS News reports. They are expected to be charged as adults and are both being held on $1 million bond.

A motive for the murder is not yet known.

Fairfield school district superintendent Dr. Laurie Noll said in a statement obtained by CBS News that schools will be closed on Friday.

“At this time our students and staff’s well-being is our top priority,” the statement reads in part. “As a community, we will stand together as we navigate any new developments. We also greatly appreciate your cooperation and assistance.”

CrimeOnline will provide further updates when more information is available.

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