Declaring the Afghan peace talks with the Taliban as "dead", President Donald Trump has said the US has hit the Taliban harder in the past four days than anytime in 10 years.

Trump stunned the world on Saturday when he announced the cancellation of a secret meeting with the Taliban and Afghan President Ashraf Ghani at Camp David near Washington. It came after the Taliban claimed responsibility of an attack in Kabul last week, in which a US soldier were among the dead.