White House officials said that the US intelligence community has confirmed the death of Afghan Taliban leader Mullah Omar, but the circumstances of his death remain uncertain.

In a statement, the White House said in a statement that his death "represents a chance for yet more progress on the path to astable, secure Afghanistan."

Afghanistan officials said on Wednesday that Omar, the elusive leader of the Taliban movement fighting to topple the government, died more than two years ago.

Omar had not been seen in public since fleeing when the Taliban were ousted from power in 2001 after a US-led invasion.