A man pretending to be a health care worker tricked a 92-year-old woman in London into paying 160 British pounds (around $217) for a fake COVID-19 vaccine, police said.

The man jabbed the victim in her arm with a dart-like implement after visiting her home in the Surbiton neighborhood of the English capital on Dec. 30, London police said in a statement on Friday.

The suspect, pictured below, then collected cash which he falsely claimed would be reimbursed via the United Kingdoms National Health Service and later returned to the womans home on Monday to ask for a further payment of 100 pounds, around $135.

He remains at large. Police asked for help in identifying him.