"We have seen considerable improvements in this series, and the labor market, particularly when it comes to layoffs," said Russell Price, a senior economist at Ameriprise Financial Services in Troy, Mich.
Differences in the timing of Easter and school spring breaks, which likely threw off the model used to smooth the data for seasonal fluctuations, had been blamed for the spike in claims during the week ended March 30.
A Labor Department analyst said no states had been estimated and there was nothing unusual in the state-level data. He noted, however, that the floating Easter holiday and spring breaks continued to pose challenges for the so-called seasonal factor.
The seasonal distortions in the data will probably remain over the next few weeks.
The four-week moving average for new claims, a better measure of labor market trends, increased 3,000 to 358,000.
Despite the rise, the four-week average stayed close to a level economists normally associate with payroll gains of about 150,000 per month.
The job market suffered a setback in March, with employers hiring the fewest number of workers in nine months. However, economists say the 88,000 payrolls gain after a solid 268,000 increase in February overstated the labor market's weakness.
(Read More: US Job Creation Plunges, but Rate Drops to 7.6%)
The economy had experienced relatively strong job gains since October. The claims data are being monitored for signs of layoffs related to $85 billion in automatic budget cuts known as the sequester.
Economists say there is little evidence so far to suggest that the spending cuts that went into effect March 1 were hurting the labor market, noting the weakness in payroll growth last month had not been confined to sectors expected to be hard hit by the cuts.
The Federal Reserve has tied monetary policy to the labor market. Minutes of its March 19-20 meeting released Wednesday showed that the U.S. central bank was moving closer to ending its monthly $85 billion purchases of mortgage and Treasury bonds to keep rates low and spur faster job growth.
(Read More: Some Fed Members Fear Monetary Policy Effects)
The meeting was held before the release of March's weak employment report.
A second Labor Department report showed little signs of inflation, with import prices slipping 0.5 percent last month after rising 0.6 percent in February. In the 12 months to March, import prices dropped 2.7 percent. Prices last month were subdued by a drop in the cost of petroleum, which offset a spike in imported food prices.
Export prices also fell last month, sliding 0.4 percent after increasing 0.7 percent in February. They were weighed down last month by declines in prices for industrial supplies and materials. Prices for nonagricultural industrial supplies and materials also fell, as did prices for consumer goods excluding automobiles.