The parents of a 10-month-old girl who disappeared from her crib say they frantically searched their Kansas City home but discovered only an open window, an unlocked front door and lights turned on.

Jeremy Irwin says he immediately knew something was wrong when he returned home from work early Tuesday. After checking on his 6- and 8-year-old sons he went to the bedroom of his daughter, Lisa, and found her gone.

Irwin and Lisa’s mother, Deborah Bradley, tearfully told reporters early Thursday that they can’t think of anyone who would abduct their child, and that no one had shown an unusual interest in her before she was taken.

They say their cell phones also were stolen but that nothing else appears to be missing from their home.