Global
Large blast heard in diplomatic area of Afghan capital - witnesses
Embassy sirens sounded and ambulances could be heard after the blast, which happened at around 8. 20 a.m. Kabul time (0350 GMT). The U.S. and British embassies and the headquarters of the NATO-led International Security Assistance Force are all in the same area of Kabul.
(Reporting by Amie Ferris-Rotman; Editing by Paul Tait)