The victim said the couple drove alongside her and the female passenger got off and grabbed the bag. Vitiutneva said she fought back, but the male driver squeezed her arm until she let go.
Russian victim Nina Vitiutneva fills out a police report after being robbed on the ocean side of Pratamnak Hill.
The purse contained about 8,000 baht in cash and electronics.
Witness Naolong Bunnak, 44, said many foreign tourists have been victimized in the neighborhood, as it is dark and there are no closed-circuit television cameras.