PORTLAND -- A woman has been arrested for the armed robbery of three businesses Monday night in Portland, police said.

Investigators believe 21-year-old Sylvana La Louangsisongkham first robbed Tienda Santa Cruz, at North Lombard Street and Philadelphia Avenue, according to Sgt Pete Simpson of the Portland Police Bureau.

He said she then robbed a Subway restaurant near New York Avenue around 8 p.m. About 10 minutes later, she allegedly held up a McDonald's at Northwest 26th Avenue and Yeon Street.

Investigators said in all three robberies, she brandished a gun, demanded money and then fled in a black SUV. The weapon was a BB gun that had been spray-painted black.

One witness had told investigators that the robber had spray-paint on her fingers.

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