Enlarge / A Knightscope K5 security robot. (credit: Knightscope)

A 300-pound egg-shaped security robot was punched to the ground by an allegedly drunken man outside a Silicon Valley shopping center, Mountain View police said.

A 41-year-old Mountain View man has been arrested in connection to the alleged parking-lot altercation with the Knightscope-made droid. The accused robo-assailant, who faces charges of prowling and public intoxication, was identified as Jason Sylvain. The robot suffered minor scratches and is back on duty following last week's incident, which was first reported Tuesday by ABC7 News.

Sylvain was not immediately reachable for comment.

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