New Delhi, June 3 -- Wall Street stock indices pulled back on Wednesday as intensifying Middle East conflict drove oil prices upward, prompting investors to lock in profits following a historic run of record highs.

At the open, the Dow Jones Industrial Average fell 86.9 points, or 0.17%, to 51,220.92. The S&P 500 fell 4.5 points, or 0.06%, to 7,605.31​, while the Nasdaq Composite dropped 1.1 points, to 27,092.845.

Fighting escalated sharply mid-week after an Iranian drone attack struck a passenger terminal at Kuwait international airport. Kuwait is a key US ally, and the strike resulted in one fatality and left 63 others wounded. The high-profile attack represents one of the most dangerous challenges yet to an already precarious c...