Nicole Darrington Clark, a Colton California, grandmother, is being sought after she allegedly stabbed two of her grandchildren, one fatally, and her adult daughter on Monday morning.

Authorities at about 9:10 a.m. received a 911 call from a woman who said Clark, 42, her mother, had just stabbed her and her two children in the 1400 block of Santo Antonio Drive, the Colton Police Department said.

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One child was killed in the attack and another was critically injured, police said. The adult victim’s condition was unknown.

The suspect was identified by authorities as 42-year-old Nicole Darrington Clark. She was said to be driving a black 2002 Hyundai Sonata sedan with license plate No. 7TQL009. h/t abc7