COLORADO SPRINGS, Colo. (AP) — The Latest on the stabbing of a family in Colorado Springs (all times local):

4:30 p.m.

Police say a 19-year-old accused of stabbing his two young siblings to death and attacking his father in Colorado Springs told investigators he carried out the plot so he could be alone in the family home.

An arrest affidavit released Tuesday says Malik Vincent Murphy bought a knife several months ago with the plan of killing his entire family and burying the bodies in the backyard.

Lt. Howard Black says officers were called to the home at about 1 a.m. Tuesday and found the 5-year-old girl and 7-year-old boy along with their father, who also was stabbed. All three were taken to hospitals, where the children died.

Police say the father is in serious but stable condition and is expected to survive. The affidavit says he told investigators that the teen had previously talked about killing the family.

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9:25 a.m.

A 19-year-old is accused of stabbing his two young siblings and also attacking his father at their home in Colorado Springs.

Police spokesman Lt. Howard Black says officers were called to the home at about 1 a.m. Tuesday and found the 5-year-old girl and 7-year-old boy along with their father, who was also stabbed. All three were taken to hospitals, where the children died.

Police say the father is in serious but stable condition and is expected to survive.

The 19-year-old, Malik Vincent Murphy, has been arrested on suspicion of first-degree murder. It's not clear if he has a lawyer yet.

Black says police are interviewing neighbors and relatives to learn more about what happened and what the family was like.

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8:40 a.m.

A 19-year-old is suspected of fatally stabbing his two young siblings and also attacking his father at their home in Colorado Springs.

Police spokesman Lt. Howard Black said officers were called to the home at about 1 a.m. Tuesday and found the 5-year-old girl and 7-year-old boy along with their father, who was also stabbed. All three were taken to hospitals, where the children died.

Police say the father is in serious but stable condition and is expected to survive.

The 19-year-old is in custody and no other suspects are being sought.

Police haven't released any information about what led up to the stabbings.

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7:35 a.m.

Police say two young children have died after being stabbed at a home in Colorado Springs.

Police spokesman Lt. Howard Black said officers were called to the home at about 1 a.m. Tuesday and found the 5-year-old girl and 7-year-old boy along with a man who was also stabbed. All three were taken to hospitals, where the children died. Police say the man didn't suffer life-threatening injuries.

Black says a 19-year-old man has been taken into custody and no other suspects are being sought.