An elderly San Francisco woman is in the hospital today, after she was brutally beaten when she tried to wake a woman sleeping outside her building.

The San Francisco Police Department was summoned to the 3300 block of Geary Boulevard, which is between Parker and Commonwealth Avenues in an area near both Laurel Heights and USF at 4:05 p.m. Wednesday.

When they arrived they discovered an 89-year-old woman suffering from head trauma. According to police, a 30-year-old woman named Angelique Parry was sleeping behind a Geary Boulevard building owned by the victim. When the elderly woman tried to wake Parry up, Parry allegedly flew into a rage and punched the older woman "multiple times in the head."

The blows caused the victim to fall to the ground. Parry then allegedly began to beat the victim's head into the pavement, stopping only when someone who passed the altercation intervened.

According to a police spokesperson, Parry then "went back to sleep" at the scene.

The victim was transported to San Francisco General Hospital for treatment of head trauma. According to a police spokesperson, her injuries are not considered life threatening.

The slumbering Parry "was taken into custody when officers came on scene" and was booked into San Francisco County Jail on suspicion of assault with a deadly weapon, elder abuse, trespassing, aggravated assault, and resisting arrest. According to a spokesperson with the San Francisco Sheriff's Department, as of Thursday afternoon Parry remains in custody.