CRYSTAL, Minn. (WCCO) — Two people have been arrested in what police say is an investigation of a possible death of an unborn baby they believe may be suspicious in Crystal, Minn.

According to police, the death was reported to have happened several years ago on the 5700 block of Quail Avenue North.

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Officers were alerted of the possible suspicious death while investigating a domestic assault report on Tuesday afternoon.

Crystal police were searching the reported property, along with members of the Hennepin County Sheriff’s Office. A number of squad cars, as well as Hennepin County Crime Lab, had responded to the scene.

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Two people — a 30-year-old man and a 28-year-old woman — have been arrested on suspicion of manslaughter of an unborn child. They have been identified by the Hennepin County Sheriff’s Office as Duane Albert Clark of Brooklyn Park and Tiffany Ayn Clark of Crystal. They are both being held in the Hennepin County Jail on charges of first-degree murder of an unborn child.

Authorities said the two had a child in 2004.

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Crystal Police Chief John Banick said their search may include digging on the property. Authorities said they will focus on a portion of the backyard at the residence once the ground there is thawed.