Iran’s president Mahmoud Ahmadinejad has accused Washington of forging the documents revealed last week showing that Tehran is working on a nuclear bomb trigger. “ ‘They are all fabricated bunch of papers continuously being forged and disseminated by the American government,’ Ahmadinejad told ABC News in an interview aired Monday when asked about the confidential documents first revealed in London's The Times newspaper. The obtained documents describe a four-year plan to test a neutron initiator, the component of a nuclear bomb that triggers an explosion. The Times claimed that foreign intelligence agencies dated the documents to early 2007 -- four years after Tehran was thought to have suspended its weapons programme. Describing charges that Iran's is continuing work on a clandestine nuclear weapons program as ‘a repetitive and tasteless joke,’ Ahmadinejad said the reports were about a nuclear trigger were ‘fundamentally not true.’ US President Barack Obama's senior advisor David Axelrod said Sunday that any accusation of Washington fabricating documents was ‘nonsense.’”