REHOBOTH, Mass. —

A Rehoboth, Massachusetts, man was arrested and is facing assault charges, which the Bristol County District Attorney's office says he committed against a missing 18-year-old woman.

Gregory Groom, 22, was charged with aggravated assault and battery, domestic assault and battery and intimidation of a witness for acts committed against Kylee Monteiro, 18, Bristol District Attorney Thomas Quinn said.

Monteiro, who is 12 weeks pregnant, has been missing since Aug. 7 and was last seen in Rehoboth. Her family members say she got into an argument with her boyfriend before she went missing, and that she told them she was in fear for her safety.

Police said Groom assaulted Monteiro on Aug. 6, the day before Monteiro was last seen.

Officers resumed a search for Monteiro after

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