A defense attorney says an Ohio woman charged with drowning her two young daughters in a bathtub heard voices urging her to kill.

Twenty-three-year-old Amber Hill has pleaded not guilty by reason of insanity. During opening statements Tuesday, her defense attorney said Hill had been increasingly troubled and depressed leading up to the deaths of her daughters on Oct. 1, 2007.

A three-judge panel is hearing the case in Cleveland.

Assistant Cuyahoga County Prosecutor Ronni Ducoff said Hill told detectives that she felt confined in her life and that the kids were part of it.

The girls' father, Jamie Cintron, rushed home and pulled his daughters from a bathtub filled with water, then called 911.