More people applied for unemployment benefits last week, the first increase in three weeks and evidence that the job market is still sluggish.

The number of people seeking benefits rose by 10,000 to a seasonally adjusted 424,000, the Labor Department said Thursday. No states cited extreme weather as a factor in the increase, a department spokesman said. Tornadoes and floods have devastated several states in the Midwest and South in the past month.

Applications are above the 375,000 level that is consistent with sustainable job growth. Applications peaked at 659,000 during the recession.

"The job market isn't exactly improving with leaps and bounds," Jennifer Lee, an economist at BMO Capital Markets, said in a note to clients. "Businesses are hiring but are likely holding back until they're more comfortable and confident with the current economic environment."

Still, the four week average, a less volatile measure, declined for the first time in seven weeks to 438,500.

Employers stepped up hiring this spring, but some economists worry that rising applications indicate hiring is slowing.

A separate report showed that the economy grew 1.8 percent in the January-March quarter, a slowdown from the 3.1 percent annual pace recorded in the October-December period. Consumer spending grew at a much slower pace, as shoppers were held back by high unemployment and $4 a gallon gas.