A 33-year-old woman says she was riding her bike to the grocery store when she was sexually attacked by a man on a motorcycle Saturday afternoon in Noble Square.

The East Village resident, who prefers to remain anonymous in fear of possible retaliation, says two motorcyclists pulled up beside her at the North Milwaukee Avenue and West Augusta Blvd. intersection.

The victim says just as the street light turned green, one man went behind her and grabbed her buttocks before taking off.

According to the woman, her 35-year-old husband shortly followed the motorcyclists toward North Milwaukee Avenue and West Division Street, to confront them.

As soon as she caught up to her husband, she said she saw him laying unconsciously on the pavement.

Confused as to what occurred, the woman said her instinct was to immediately check his chest for gunshot wounds—assuming the worst.

A witness took photos of the bright green motorcycle involved, the victim said, and told police that the man on the motorcycle punched the victim's husband—causing him to fall to the ground.

The offender riding a lime green motorcycle, was wearing a hooded sweatshirt with the words "Legalize Wheelies" on the back, with a helmet covered in stickers, police said.

The victim told NBC 5 she is ok physically, though her husband suffered a concussion.

Anyone who recognizes the motorcyclist is urged to contact authorities immediately.