MIRAMAR, Fla. -

The mother of a 3-month-old boy who is in the hospital after nearly drowning in a Miramar canal has been arrested.

Inakesha Armour was arrested Tuesday on two counts of attempted murder.

Miramar police said a woman was driving through the Riviera Isles neighborhood Tuesday afternoon when she saw the infant lying in the grass and Armour standing nearby, so she stopped to check on them.

According to the police report, the woman claimed Armour told her to call her husband because she had just killed her baby. The woman, who is a nurse, began CPR until police and paramedics arrived.

Police said Armour admitted to attempting to kill her baby by submerging him in the canal for several minutes. In an interview with detectives, Armour said once she saw that his face had turned blue, she jumped into the water to remove him.

Armour also admitted to police about attempting to kill her child once before by giving him adult cough syrup and smothering him with a pillow, but her mother intervened that time, the report said.

Police said Armour told detectives she has been diagnosed with postpartum depression and has thought about killing her baby daily.

Armour's husband was aware that she attempted to kill their son before, the report said.

The baby remains in critical condition at Joe DiMaggio Children's Hospital in Hollywood.