Two British journalists working for US television network CBS were among four people killed when a car bomb hit a US military patrol in Baghdad on Monday.
American CBS correspondent Kimberly Dozier was seriously wounded and six US soldiers were also injured, CBS and the US military said in separate statements.
An unnamed US soldier and an Iraqi civilian working with the military were killed along with the network's London-based cameraman Paul Douglas, 48, and soundman James Brolan, 42.
Dozier, 39 and a long-time reporter on Middle East affairs, was operated on in a Baghdad military hospital. Doctors were "cautiously optimistic", CBS said.
The crew had been filming a report on a joint US and Iraqi army patrol through the Iraqi capital in mid-morning.