A mugger knocked down U.S. Sen. John Kerry's sister and stole her purse in downtown Manhattan.

Police say Margaret Kerry was attacked after leaving a theater in SoHo at about 10:45 p.m. Wednesday. A thief stole her pocketbook, which held about $60 and credit cards. Kerry, 66, suffered a cut to her head.

Police say no suspects have been arrested. Kerry told the New York Post that she didn't get a good look at her attacker.

Kerry, who works for the U.S. ambassador to the United Nations, worked on her brother's 2004 presidential campaign.