NATO said on Monday the death of al Qaeda leader Usama bin Laden in a firefight with U.S. forces was a "significant success" for the security of NATO allies.

The Western military alliance's secretary general, Anders Fogh Rasmussen, said in a statement NATO should continue its mission in Afghanistan to ensure it "never again becomes a safe haven for extremism."

Bin Laden was killed by U.S. troops in a raid and ensuing fire-fight on Sunday.