Terrorist groups would succeed in using weapons of mass destruction within five years unless the world community “acts decisively”, according to a US congressionally mandated commission set up to scrutinise WMD after the 2001 attacks.

“It is more likely than not that a weapon of mass destruction will be used in a terrorist attack somewhere in the world by the end of 2013,” according to the report, released yesterday by the commission on the prevention of WMD proliferation and terrorism.