It's hard to find much that shocks me about the world we live in, especially when it comes to the kind of cruel things people can somehow do to each other.

But this one might take the cake.

Tucson police have arrested a 25-year-old woman for allegedly shooting both of her young children to death, then attempting to do the same to herself. Perla Morales managed to survive the apparent self-inflicted injuries, while 4-year-old daughter Emma Rosovich and 17-month-old Richard Rosovich Jr. were not as fortunate.

Police have booked Morales on two counts of suspicion of first-degree murder, sending her to the Pima County Jail as soon as she was released from the hospital on Sunday. They're not saying what Morales' motive is for allegedly killing her children, but it seems they have no doubt it was intentional. No one else was home at the time of the shooting, police say.

The shooting happened around 7 p.m. Saturday at a home near Interstate 19 and Valencia Road.