Idaho Falls Police Department officers are at the scene of a house at Thayer Bridge Circle in Idaho Falls.

Idaho Falls City Spokeswoman Kerry Hammon said police have a male suspect in custody as part of an investigation into a missing woman who may be dead. The man in custody was in a domestic relationship with the victim.

"We are not looking for a live body recovery," Hammon wrote in a text message to the Post Register. "We are looking at evidence of a more serious crime."

Hammon said coworkers told police the woman had not come into work at Walgreens on Sunday. When she again did not appear Monday, the woman's coworkers contacted her family. The family then contacted police to report her missing.

Chris Kenney contacted the Post Register on Monday morning to report his niece, Kaylynn Blue, was missing since Sunday. He gave an editor Blue's address on Thayer Bridge Circle. 

Kenney later confirmed a police detective had been in contact with the family about Blue and they had told the family she had died. 

Brittany Kochar, Blue's sister, announced the death on Facebook.

"It is with the heaviest of hearts that I announce the passing of my sister Kaylynn Blue she was an amazing sister and friend and had the biggest and kindest heart of any person I know," Klochar wrote. "Your love for your family, friends & especially your niece will never be forgotten & always missed. So many love you. I will never forget you and will love you forever."

Hammon said police discovered "suspicious circumstances" at the woman's home and are waiting for a search warrant to investigate her house. Hammon did not name the missing woman or the man in custody, saying the department needed to make "proper notifications".

Reporter Johnathan Hogan can be reached at 208-542-6746.