US STOCKS-Wall St opens lower after Brussels explosions
* Explosions in Brussels kill 34 people
* Airline stocks hit hardest
* Gold jumps about 1 pct
* Indexes down: Dow 0.33 pct, S&P 0.40 pct, Nasdaq 0.28 pct (Updates to open)
By Abhiram Nandakumar and Tanya Agrawal
March 22 (Reuters) - Wall Street opened lower on Tuesday after explosions in Brussels sparked fresh geopolitical concerns and sent investors scurrying for safe-haven assets.
At least 34 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 and Delta Airlines, were down between 3 percent and 1.6 percent. The broader NYSE Arca Airline index was down 1.8 percent. Continuación...