From a reliable source:
It is the biggest attack since the Taliban launched their annual spring offensive on Sunday, saying it would take aim at foreign military bases and diplomatic areas.
The attack came four days after three British soldiers were killed in a similar attack in the neighbouring province of Helmand.
Nineteen US personnel have been killed in the last week in three air crashes and Saturday's bombing.
President Obama is responsible for a thousand more Afghan Expedition US deaths in four years than President Bush II owned up to in almost eight.