Two people arrested over the weekend in Michigan have been charged with killing a Kansas couple while stealing their car.

Online court records show that 33-year-old Steven Pierce was charged Tuesday and 29-year-old Kallie Peters on Monday with two counts of first-degree murder, aggravated robbery and theft. Both are from Junction City, Kansas. No attorney is listed for them in the online records.

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The victims in the case were identified as 75-year-old Valerie Krissman and 80-year-old Roland Krissman.

The complaint said that the killing happened earlier this month in Junction City during the theft of the Krissmans' 2006 Buick Lacrosse.

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Junction City police said in a news release the Michigan State Patrol arrested Pierce and Peters on warrants Sunday.

No other details were immediately released about the killing. The prosecutor's office didn't immediately return a phone message.