A woman who demanded exactly $5,300 robbed the East Boston Savings Bank branch at 430 West Broadway Monday afternoon after telling the teller that both she and her son had cancer and that she would blow up the bank with the device she was holding if she did not get the money, the FBI Bank Robbery Task Force reports.

Police say the woman wore a face mask, blue hospital scrubs, purple gloves and black and white shoes with white laces during the robbery, shortly before 1 p.m.

She was 5'1" and Dominican, the task force says, adding she also "appeared emotionally unstable and was crying."

If she looks familiar, contact the task force at 857-386-2384.