A loud explosion has hit the centre of the Afghan capital, Kabul, with a huge plume of smoke seen over the city.
The exact location was not immediately clear but there were reports it was close to the ministry of defence.
The Reuters news agency said sirens had been heard from the US embassy compound.
This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version.
If you want to receive Breaking News alerts via email, or on a smartphone or tablet via the BBC News App then details on how to do so are available on this help page. You can also follow @BBCBreaking on Twitter to get the latest alerts.
All copyrights for this article are reserved to bbc asia