President Trump 'to pull thousands of troops' from Afghanistan

The Trump administration is planning to withdraw thousands of troops from Afghanistan, US media say.

Reports, citing unnamed officials, say about 7,000 troops - roughly half the remaining US military presence in the country - could go home within months.

The reports come a day after the president announced the country's military withdrawal from Syria.

Earlier on Thursday, Mr Trump's defence secretary, Jim Mattis, announced his resignation from his post.

In his letter of departure, Gen Mattis mentioned his diverging views with the president, but did not cite troops withdrawals directly.

Before his election, Mr Trump repeatedly publicly advocated leaving Afghanistan, but last year he indicated he would keep boots on the ground indefinitely to prevent the country's collapse amid a Taliban resurgence.

Reports about the sharp reduction of forces emerged on Thursday, but have not been confirmed by US defence officials.