The Taliban told U.S. President Donald Trump in an open letter on Tuesday that the military situation in Afghanistan was "far worse than you realize" and sending in more troops would be self-destructive.

A senior Taliban official told Reuters the rare decision to address Trump directly was timed to coincide with the president's deliberations on the future of U.S. policy in Afghanistan.

"Previous experiences have shown that sending more troops to Afghanistan will not result in anything other than further destruction of American military and economical might," the Taliban said in the lengthy English-language letter.