Two American soldiers have been killed by a roadside bomb in Baghdad, the US military has said.
US troops have been targeted almost daily
Another soldier was wounded in the blast, in a western suburb of the Iraqi capital on Wednesday night.
The 1st Armoured Division said the bomb exploded as the soldiers were passing by in their vehicles.
It comes after two consecutive days of heavy bloodshed in Iraq, when nearly 100 Iraqis were killed by car bombs outside recruitment centres.
A US military spokeswoman said the latest attack was being investigated.
More than 370 Americans have been killed in Iraq since the start of the US-led invasion last March.
On Wednesday, 47 Iraqis died when a suicide bomber blew himself up outside an army recruitment centre in the capital.
A day earlier, at least 50 people were killed in a similar attack outside a police recruitment office south of Baghdad.
There has been a marked increase in attacks on Iraqis seen to be co-operating with the US-led coalition in recent weeks, particularly police and those wanting to join the new Iraqi army.