US STOCKS-Wall St set to open lower after Brussels explosions
* Explosions in Brussels kill at least 26 people
* Airline stocks hit hardest
* Gold jumps about 1 pct
* Futures down: Dow 47 pts, S&P 8.25 pts, Nasdaq 20.5 pts (Adds details, changes comment, updates prices)
By Abhiram Nandakumar and Tanya Agrawal
March 22 (Reuters) - Wall Street looked set to open lower on Tuesday after explosions in Brussels sparked fresh geopolitical concerns and sent investors scurrying for safe-haven assets.
At least 26 people were killed in twin attacks on Brussels airport and a rush-hour metro train in the Belgian capital, triggering security alerts across western Europe.
European markets fell, while traditional safe havens gold and government bonds firmed up as reports of the events in the de facto capital of the European Union unfolded. Airline and travel-related stocks were the worst hit.
Shares of American Airlines, Southwest Airlines , Delta Airlines, United Continental Holdings , JetBlue Airways, and Spirit Airlines were down between 3.3 percent and 1.6 percent in premarket trading. Continuación...