A western Texas teen is accused of fatally shooting his ex-girlfriend’s mother and two siblings, ages 13 and 9, authorities said Wednesday.

The 15-year-old boy has been charged with capital murder involving multiple people, the Odessa Police Department said in a news release.

Odessa police responded to an apartment complex on Hunter Miller Way shortly before 6 p.m. Tuesday following reports of a shooting. Officers located three victims — one adult and two children with apparent gunshot wounds — all of whom were pronounced dead at the scene , police said.

A 15-year-old, who was named a suspect in the triple shooting, tried to flee but was arrested. He has not been publicly named.

Detectives later determined that the teen had planned to shoot his 15-year-old ex-girlfriend outside her

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