The girl, who is aged under 16, was using a headset to access a VR room when adult men attacked her avatar.
She was not injured given the assault happened within an immersive reality game, but she is said to be psychologically and emotionally traumatised.
Details about the case have reportedly been kept under wraps to protect the child amid concern a prosecution for the online assault is not viable.
It has led to questions over whether police time is being wasted investigating such problems when it has a backlog of real rape cases to deal with.
But home secretary James Cleverly told LBC's Nick Ferrari at Breakfast: "I know it is easy to dismiss this as being not real, but the whole point of these virtual environments is they are incredibly immersive. ...
See the full story here: https://www.lbc.co.uk/news/police-investigate-rape-metaverse/