U.S. worker productivity accelerated to a still-modest 0.9 percent annual pace between April and June after dropping the previous quarter.

The second-quarter gain beat economists' expectations and reversed a decline in the January-March quarter, when the Labor Department's revised numbers show productivity shrank at a 1.7 percent annual pace.

Labor costs rose at a 1.4 percent annual pace from April through June, reversing a revised 4.2 percent drop the previous quarter.