SAN FRANCISCO—Police in Richmond are offering a $10,000 reward for information in the alleged gang rape of a woman who authorities say was jumped by four men, taunted for being a lesbian and left naked outside an abandoned apartment building.

Detectives say the 28-year-old victim was attacked on Dec. 13 after she got out of her car, which bore a rainbow gay pride sticker. The men, who ranged from their late teens to their 30s, made comments indicating they knew her sexual orientation, said Richmond police Lt. Mark Gagan.

Along with the brutality of the assault, the fact that the woman may have been targeted because she was gay has unnerved the officers assigned to the case, Gagan said. They went public with some details about the case over the weekend hoping it would motivate witnesses to come forward with information about the suspects, who have not been apprehended.

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San Jose Mercury News,  US