Police say two 15-year-old runaways who were apprehended in eastern Sioux Falls on Monday have been tied to other crimes in the city.

Officer Sam Clemens says additional charges were filed against the boys, from Fargo, North Dakota, on Tuesday afternoon.

He says the boys are charged with first-degree robbery, aggravated assault and petty theft in the robbery of the Shop-N-Cart at 6th & Cleveland early last Friday.

They are also charged with aggravated assault for an attempted carjacking earlier this week on South Cleveland Avenue and possession of a stolen vehicle.

Clemens says the runaways are believed to have been living in the stolen car for several days on Majestic View Place.