The Taliban has claimed responsibility for a fatal car bombing in Kabul, just as the US special envoy for peace in Afghanistan announces a draft peace deal that will allow for the withdrawal of US troops.

Five civilians were killed and 50 injured in Monday's blast.

The explosion rocked the Afghan capital on the same day that US envoy Zalmay Khalilzad appeared in an interview on local television. He revealed the United States and the Taliban have agreed in principle on a draft peace accord.

The deal was reached during the ninth round of talks with the Taliban in Qatar. Khalilzad says US troops will withdraw from Afghanistan after 18 years in the war-battered country if the Taliban observes its terms.

The agreement still needs approval from US President Donald Trump.

A Taliban representative tells NHK that the group has agreed to the basic outline of the accord, but working-level discussions are ongoing.

The latest violence highlights uncertainty over the two sides' ability to reach a final pact.

NHK