The Afghan Taliban has claimed responsibility for the suicide attack at an Afghan defence ministry gate in Kabul.
They said in a statement the attack "is a kind of message" for US defence secretary Chuck Hagel, who is visiting the country.
Hagel, who was in a safe location at an ISAF facility at the time of the blast, has planned to meet US commanders and troops and hold talks with President Hamid Karzai.
An Afghan defence ministry official told Reuters at least nine civilians had been killed and 14 people wounded in today's attack.
More top news
Susannah Mushatt Jones from New York is known as Tee, short for auntie, to her 100 nieces and nephews.
The tweet said: "Our lionesses go back to being mothers, partners and daughters today, but they have taken on another title - heroes."
The BBC has agreed to pay for TV licences for viewers over the age of 75, the Culture Secretary John Whittingdale has confirmed.