The top US general has described the Taliban as a “ruthless group” and says it is unclear whether they will change.
Gen Mark Milley said, however, it was “possible” that the US would co-ordinate with the Islamist militants on future counter-terrorism operations.
US forces withdrew from Afghanistan on Tuesday, ending America’s longest war 20 years after launching an invasion to oust the Taliban.
The Islamists are now in control and expected to announce a new government.