Updated

A Massachusetts woman charged in the deaths of her 9-year-old daughter and unborn son has been arraigned on murder and manslaughter charges, but an evaluation done for the court found her still incompetent to face trial.

Authorities say Fang Chi-Xue of Quincy fatally stabbed her 9-year-old daughter in April and stabbed herself in the abdomen, killing her unborn baby. She is also accused of trying to strangle her 14-year-old daughter, who told police her mother believed her husband was going to leave her.

Chi-Xue was arraigned Thursday in Norfolk Superior Court. A not guilty plea was entered on her behalf after the judge was told she remains mentally incompetent.

She is due back in court March 12, when a new report on her competency is due.