MADISON, Wis. -- Madison police arrested a woman and a teenager on suspicion of robbing an elderly woman at the Woodman's on the city's East Side on Saturday.

Authorities said that the victim was attacked by three people, who stole the woman's wallet and purse and fled in a van.

That van was found in Fitchburg, where police arrested two women.

Tiana Smith, 19, is charged with strong armed robbery while an unnamed 16-year-old has been charged with being party to an armed robbery.

Police said that incident remains under investigation.