HOUSTON (AP) _ A mother accused of drowning her five children pleaded innocent by reason of insanity Wednesday to two counts of capital murder.

Andrea Pia Yates, 37, stood quietly as her attorney entered the plea for her and said nothing during the brief court proceeding. Her husband was seated nearby her in the spectator section of the courtroom.

Prosecutors said a court-ordered evaluation determined she was legally competent to stand trial although her attorneys asked for a competency hearing to be scheduled within the next two weeks.

Defense lawyers said they wanted to see evidence how the doctor ruled she was competent.

Yates, of Houston, faces one count of capital murder for the June drowning deaths of her two oldest children, Noah, 7, and John, 5. A grand jury indicted her on a second charge of capital murder of a child under 6 last week for the death of Mary, 6 months.

Yates also admitted killing sons Paul, 3, and Luke, 2, police said.