BBC: Nine US soldiers have been killed in a suicide bomb attack on a base north of Baghdad, military officials have said.
Some 20 troops and an Iraqi civilian were injured in the attack, which happened in the volatile province of Diyala, to the north-east of Baghdad.
There has been fierce fighting in Diyala recently, pitting US and Iraqi forces against Sunni and Shia militias.
It is thought to be the worst single US loss on the ground since late 2005, when 10 marines died near Falluja. US troops die in new Iraq attack (Read on)
Mark Alexander
