Online retail sales in the United States on Black Friday jumped 26 percent to reach 816 million U.S. dollars this year, comScore said on Sunday.

According to comScore, a closely watched tracker of Internet activity, year-over-year growth on Black Friday in 2010 was 9 percent, and this year makes the heaviest spending day on the Internet so far in 2011.

"With brick-and-mortar retail also reporting strong gains on Black Friday, it's clear that the heavy promotional activity had a positive impact on both channels," comScore Chairman Gian Fulgoni said.

According to ShopperTrak, U.S. retail sales on Black Friday, the post-Thanksgiving shopping day, rose an estimated 6.6 percent to a record 11.4 billion U.S. dollars, the strongest percentage gain since 2007.

Consumers spent 11.4 billion dollars, ShopperTrak said in a statement Saturday.

Foot traffic rose 5.1 percent on Black Friday, according to the Chicago-based research firm.

ShopperTrak has estimated that sales for all of November and December will rise about 3 to 3.3 percent. (Agencies)

VietNamNet/Xinhuanet