A Quebec woman is facing first-degree murder charges in the deaths of her two young daughters.

Adele Sorella, 43, looked disoriented as she made a brief appearance in front of a judge in a Laval courthouse Thursday.  

"You will undergo an assessment regarding your ability to stand before this court," Quebec court Judge Lise Gaboury told Sorella.

Sorella has been in police custody since the early hours of Wednesday morning, after police found her SUV wrapped around a utility pole a few kilometres from the Laval, Que., home where her daughters were found the day before.

Sorella was not injured in the crash, but was taken to hospital and held for a psychiatric evaluation on Wednesday.

Her daughters, whom media have identified as eight-year-old Sabrina and nine-year-old Amanda De Vito, were found by family members in their house around 4 p.m. Tuesday.

They were pronounced dead at the scene and police believe they were dead for some time before they were found.

Police said there were no signs of violence in the house.

Di Genova said preliminary autopsy results on the girls may be available shortly.

After the girls were found on Tuesday afternoon, police searched for Sorella, who was described by family members as being depressed.

The whereabouts of the girls' father, Giuseppe De Vito, is unknown, though police say he is not considered a suspect in his daughters' deaths.

De Vito has not been seen since November 2006, since he was wanted by police for drug offences as part of Project Colis�e -- a police project that targeted members of the Quebec and Ontario underworld.

With files from The Canadian Press