US President Donald Trump on Wednesday repeated that he wanted to bring American troops back from Afghanistan, saying the US is acting as a police force and it is time for Afghans to police their country.

“We are acting as a police force, not the fighting force that we are, in Afghanistan. After 19 years, it is time for them to police their own Country. Bring our soldiers back home but closely watch what is going on and strike with a thunder like never before, if necessary!” tweeted Trump.

Earlier, news agencies reported that Trump on Tuesday at a White House news conference renewed his desire for a full military withdrawal from Afghanistan.