By CBSLA Staff

NORWALK (CBSLA) — The public’s help is needed to identify a woman who police say swapped a toy ring for a diamond ring during an online sale meetup.

The surreptitious swap happened on July 21 at a McDonald’s in Norwalk. The owner of the diamond ring told Los Angeles County sheriff’s deputies she had agreed to meet with the woman through the online marketplace OfferUp.

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While the seller was distracted, the purported buyer swapped replaced the diamond ring with a toy ring.

The ring was worth $2,200, authorities said.

The thief was described as a Hispanic woman, about 5-foot-3 and 110 pounds. Surveillance video shows her carrying a large black tote purse on her shoulder, a gray V-neck T-shirt, ripped jeans, light-colored sneakers, and a black face mask with an unknown print.

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Anyone with information about the woman can call sheriff’s Detective Zamudio at (562) 466-5430.