US STOCKS-Wall St lower in wake of air strikes on Yemen
* Oil jumps after air strikes on Yemen
* SanDisk tumbles in premarket after outlook cut
* Weekly jobless claims less than expected
* Flash Markit services sector PMI on tap
* Indexes off: Dow 0.64 pct, S&P 0.54 pct, Nasdaq 1.01 pct (Updates to market open)
By Chuck Mikolajczak
NEW YORK, March 26 (Reuters) - U.S. stocks fell at the open on Thursday to put the S&P 500 on track for a fourth straight decline, after Saudi Arabia and its allies launched air strikes on Yemen.
Oil prices spiked, with Brent crude up 2.4 percent to $57.86 and U.S. crude up 3 percent to $50.69 after warplanes from Saudi Arabia and its allies struck Shi'ite Muslim rebels fighting to oust Yemen's president. Halliburton shares gained 1.5 percent to $44.12.
"Obviously the situation in Yemen is being used as the excuse for this pullback, which is a continuation of yesterday," said Peter Cardillo, chief market economist at Rockwell Global Capital in New York. Continuación...