Police are searching for a Colorado mother who is suspected of killing two of her children and injuring a third.

Kimberlee Singler, 35, is accused of lying about a burglary at her home earlier this month in which two of her three children were found dead, Colorado Springs police said Thursday.

Singler was last seen on Dec. 23, police said. A warrant has been issued for her on four counts of felony murder in the first degree, two counts of felony attempted murder, three counts of felony child abuse and one count of felony assault in the first degree. 

After receiving a 911 call for a burglary on Dec. 19, Colorado Springs police responded to the scene to find Singler and an 11-year-old girl both injured as well as a 9-year-old girl and a 7-year-old boy who were dead, authorities said.

The mother and injured daughter were treated at the scene before they were transferred to an area hospital, police said.

Upon further investigation, police said the initial report of a burglary was "unfounded," according to a press release.

Police established a probable cause for the murders on Dec. 26 and obtained an arrest warrant for Singler. She is charged with four counts of first-degree murder, two counts of first-degree attempted murder, three counts of child abuse and one count of assault, according to the arrest warrant.

A court set a $10 million bond for Singler, but the details of the arrest warrant are sealed under a court order, police said.

Singler's 11-year-old daughter is recovering and is safe and accounted for in the Colorado Springs area, police added.