Consumers sharply curtailed their spending in January, indicating a potential weakening in economic growth ahead, according to a Commerce Department report Friday.

U.S. retail sales dropped by the most in nearly two years in January, likely because of frigid temperatures and moderation following hefty gains in the past four months, suggesting a sharp slowdown in economic growth early in the first quarter.

Sales plummeted 2.8% last month at auto dealers and slumped at furniture stores, home and garden centers. Even in the usually strong online retail sector saw a 1.9% decline. Sales rose at general merchandise stores, a category that includes big retailers like Walmart and Target, and at restaurants and bars.