(FILES) In this file photo an Afghan policeman keeps watch at a check post near the US embassy in Kabul on June, 26, 2013.  The United States on April 27, 2021 ordered non-essential staff to leave its Kabul embassy, citing increased threats as Washington prepares to end its 20-year war. The State Department in a travel advisory said it had "ordered the departure from US embassy Kabul of US government employees whose functions can be performed elsewhere."
 / AFP / SHAH MARAI
An Afghan policeman keeps watch at a checkpoint near the US embassy in Kabul. AFP

US pulls diplomatic staff from Kabul and issues travel alert