(CNN) An Alabama teenager has been arrested for allegedly killing his mother and twin 13-year-old brothers.

The victims -- identified as Holli Christina Durham, 36; Branson Durham, 13; and Baron Durham, 13 -- were found dead of apparent stab wounds inside a house in Munford, the Talladega County Sheriff's Office said

The victims' son and older brother, 16-year-old Landon Durham, faces a capital murder charge in all three killings, Talladega County District Attorney Steve Giddens told CNN affiliate WBRC . Durham is being charged as an adult.

Landon Durham, right, poses for a photo with his mother and twin brothers in this photo posted to Facebook by his mother last year.

According to Giddens, Durham allegedly killed them "probably sometime early Tuesday morning." Asked whether Durham went to school after the alleged killings, Giddens said, "I was told that he did, yes."

Suzanne Lacey, superintendent of Talladega County Schools, called the killings a "tragedy."

Read More