US President Joe Biden met Afghan President Ashraf Ghani and his former political foe, Abdullah Abdullah, on Friday at the White House where he called on Afghans to decide the future of their country as the last US troops pack up after 20 years of war and government forces struggle to repel Taliban advances.

Biden, seated beside Ghani and Abdullah in the Oval Office, called them "two old friends" and said US support for Afghanistan was not ending but would be sustained despite the US pullout.

"Afghans are going to have to decide their future, what they want," said Biden, saying the "senseless violence has to stop."