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N.D. (AP) — A reward is being offered in the case of two people who went missing 23 years ago while on their way to a North Dakota farm.

Authorities say Kristin Diede and Robert Anderson were last seen on their way to a farm north of Wishek during the late afternoon hours on Aug. 15, 1993.

A van that Diede and Anderson were driving was found abandoned a few days later in Aberdeen, South Dakota.

The North Dakota Bureau of Criminal Investigation considers Diede and Anderson to be homicide victims, but few details have been released.

A $5,000 reward is available to anyone who can lead authorities to remains of the victims. More information can be found on the website www.kristinjoydiede.com.