An Australian security contractor working in Iraq is recovering in a Baghdad hospital after surviving a roadside bombing that killed his three Fijian workmates.
The vehicle the four men were travelling in triggered the device before overturning.
They worked for a major security firm which protects Iraqi office buildings and companies.
Meanwhile, two German engineers held hostage in Iraq for more than three months have been released.
They were taken on their way to work in late January.
Their captors had threatened to execute them unless Germany closed its embassy in Baghdad and withdrew all its companies from Iraq.