PITTSBURGH — Prosecutors will seek the death penalty against a woman accused of killing her 17-month-old son and trying to kill her 2-year-old daughter while sending angry texts to their father.

A lawyer for 21-year-old Christian Clark of McKeesport, Pa., had no comment on the decision today.

Allegheny County District Attorney Stephen Zappala Jr. says the children’s ages contributed to the decision to seek the death penalty.

Investigators say she sent a video of the boy’s lifeless body to the father during several hours of angry texts last month.

Andre Price Jr. is charged with child endangerment for allegedly failing to call 911. His lawyer has said Clark made similar threats in the past without carrying them out.