BREAKING: Bombing Near US Embassy in Afghanistan?

@breakingnews: BREAKING: Journalists, on Twitter, reporting an explosion in Kabul

There are reports from journalists on the ground in Afghanistan that a huge explosion has been heard in Kabul.

No confirmation yet on the explosion, or where it has happened. Jonathan Boone, a journalist writing for The Guardian, has recieved a phone call suggesting the explosion was at the U.S. embassy, but that's yet to have been confirmed.