The death of Al-Qaeda leader Osama bin Laden should also serve as a warning to the United States and its allies as this can open more attacks of terrorism, therefore, more vigilance should be practiced by citizens world-wide, President Barack Obama said in his televised address.

"There's no doubt that al Qaeda will continue to pursue attacks against us" Mr. Obama said in a late-night televised address from the White House emphasizing that the fight against terrorism is not ended with the death of their leader Mr Bin Laden.

Mr Obama said that American operatives earlier today killed the al-Qaeda leader after a gunfight outside of Islamabad, the capital of Pakistan. The president said he authorized an attack on Mr Bin Laden's compound after they have determined last week there was enough intelligence to take action.

The news brought a cheering, chanting crowd outside the White House fence before Mr Obama delivered the televised press brieifing.

"On nights like this one we can say to those families who have lost loved ones to al Qaeda's terror: Justice has been done," Obama said addressing the nation and the rest of the world from the White House.

Market analysts in Asia said the good news on the death of al Qaeda's group has been reflected on the performance of the regional markets. The news had bode well with the positive earnings results of some American companies topping their estimates.

Stocks in Asia jumped, driving the regional benchmark MSCI Asia Pacific Index rose 0.6 percent to 140.25 at 1:17 p.m. in Tokyo, the highest level since Jan. 19. Almost three stocks rose for each that fell on the gauge.

The said measure also rose 0.5 percent last week after the Federal Reserve renewed its pledge to stimulate growth in the U.S., still the world's biggest economy, with low interest rates, and adding more confidence on the outlook for exporters.

"The death of Bin Laden eases some concern, but it's hard to imagine it'll lead to a reduction of risk in the Middle East, and so the market's reaction may be transitory," said Koichiro Nishio, a market analyst in Tokyo at SMBC Nikko Securities Inc said in related report of Bloomberg. "The recovery of demand in the U.S. and other developed countries means a better environment for earnings."