April 30 (Reuters) - Wall Street's main indexes opened

lower on Tuesday after stronger-than-expected labor costs

signaled persistent inflationary pressures, while caution

prevailed ahead of the Federal Reserve's interest rate decision.

The Dow Jones Industrial Average fell 48.7 points, or

0.13%, at the open to 38,337.4. The S&P 500 fell 12.4

points, or 0.24%, at the open to 5,103.78​, while the Nasdaq

Composite dropped 62.2 points, or 0.39%, to 15,920.886

at the opening bell.

(Reporting by Shristi Achar A in Bengaluru; Editing by Devika

Syamnath)