Police were actively searching for a wanted subject in the area around 2 p.m. and asked anyone living in the area to shelter in place and lock all doors and windows.
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Officers were looking for 28-year-old Carlos Palacios. He was described as Hispanic, 5 feet 7 inches tall, weighing 150 pounds, with brown hair, brown eyes and a goatee.
It was not clear on Monday evening whether or not Palacios was apprehended.
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Anyone seeing suspicious activity can call Antioch police at (925) 778-2441.