Redbook Research reported that chain store sales were up 2.2 percent last week over the same period last year.

The International Council of Shopping Centers and UBS said sales at chain stores were up 0.9 percent for the week ending December 10.

The International Council of Shopping Centers and UBS report chain store sales were up 0.3 percent last week.

U.S. chain store sales increased slightly in the latest week due in part to Labor Day sales and back-to-school shopping, a report said on Tuesday.

Retail sales at the top chain stores were up 2.9 percent on a year-over-year basis for the week ending Sep. 4, according to Redbook Research.

Chain store sales were up the week ending July 31 by 3.1 percent compared to the same period a year earlier.